detailed information: The input equation set is:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | A | + | | B | + | | C | | -1 | D | | -1 | E | | -1 | F | = | | 0 | | (2) |
| -2 | A | | -8 | B | | -2 | C | + | | E | + | | F | = | | -1 | | (3) |
| | | | Question solving process:
Divide the two sides of equation (1) by 2, the equation can be obtained: | -1 | A | | -1 | B | | - | 1 2 | C | + | | | 1 4 | E | + | | | 1 4 | F | = | | - | 1 2 | (7) | , then add the two sides of equation (7) to both sides of equation (2), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (2) |
| -2 | A | | -8 | B | | -2 | C | + | | E | + | | F | = | | -1 | | (3) |
| | | |
Subtract both sides of equation (1) from both sides of equation (3) ,the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (2) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (3) |
| | | |
Divide the two sides of equation (1) by 2, the equation can be obtained: | -1 | A | | -1 | B | | - | 1 2 | C | + | | | 1 4 | E | + | | | 1 4 | F | = | | - | 1 2 | (8) | , then subtract both sides of equation (8) from both sides of equation (4), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (2) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (3) |
| -1 | B | | - | 7 2 | C | + | | | 3 4 | E | | - | 1 4 | F | = | | - | 1 2 | | (4) |
| | |
Divide the two sides of equation (1) by 4, the equation can be obtained: | - | 1 2 | A | | - | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | + | | | 1 8 | F | = | | - | 1 4 | (9) | , then add the two sides of equation (9) to both sides of equation (5), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (2) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (3) |
| -1 | B | | - | 7 2 | C | + | | | 3 4 | E | | - | 1 4 | F | = | | - | 1 2 | | (4) |
| | | 1 2 | B | + | | | 3 4 | C | | - | 7 8 | E | + | | | 1 8 | F | = | | - | 5 4 | | (5) |
| |
Divide the two sides of equation (1) by 4, the equation can be obtained: | - | 1 2 | A | | - | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | + | | | 1 8 | F | = | | - | 1 4 | (10) | , then add the two sides of equation (10) to both sides of equation (6), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (2) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (3) |
| -1 | B | | - | 7 2 | C | + | | | 3 4 | E | | - | 1 4 | F | = | | - | 1 2 | | (4) |
| | | 1 2 | B | + | | | 3 4 | C | | - | 7 8 | E | + | | | 1 8 | F | = | | - | 5 4 | | (5) |
| | | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | | - | 7 8 | F | = | | - | 5 4 | | (6) |
|
交After the exchange of equation (2) and equation (3), the equation system becomes:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| -1 | B | | - | 7 2 | C | + | | | 3 4 | E | | - | 1 4 | F | = | | - | 1 2 | | (4) |
| | | 1 2 | B | + | | | 3 4 | C | | - | 7 8 | E | + | | | 1 8 | F | = | | - | 5 4 | | (5) |
| | | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | | - | 7 8 | F | = | | - | 5 4 | | (6) |
|
Divide the two sides of equation (2) by 6, the equation can be obtained: | -1 | B | | - | 1 6 | C | + | | | 1 12 | E | + | | | 1 12 | F | = | | 0 | (11) | , then subtract both sides of equation (11) from both sides of equation (4), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 10 3 | C | + | | | 2 3 | E | | - | 1 3 | F | = | | - | 1 2 | | (4) |
| | | 1 2 | B | + | | | 3 4 | C | | - | 7 8 | E | + | | | 1 8 | F | = | | - | 5 4 | | (5) |
| | | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | | - | 7 8 | F | = | | - | 5 4 | | (6) |
|
Divide the two sides of equation (2) by 12, the equation can be obtained: | - | 1 2 | B | | - | 1 12 | C | + | | | 1 24 | E | + | | | 1 24 | F | = | | 0 | (12) | , then add the two sides of equation (12) to both sides of equation (5), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 10 3 | C | + | | | 2 3 | E | | - | 1 3 | F | = | | - | 1 2 | | (4) |
| | | 2 3 | C | | - | 5 6 | E | + | | | 1 6 | F | = | | - | 5 4 | | (5) |
| | | 1 2 | B | | - | 1 4 | C | + | | | 1 8 | E | | - | 7 8 | F | = | | - | 5 4 | | (6) |
|
Divide the two sides of equation (2) by 12, the equation can be obtained: | - | 1 2 | B | | - | 1 12 | C | + | | | 1 24 | E | + | | | 1 24 | F | = | | 0 | (13) | , then add the two sides of equation (13) to both sides of equation (6), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 10 3 | C | + | | | 2 3 | E | | - | 1 3 | F | = | | - | 1 2 | | (4) |
| | | 2 3 | C | | - | 5 6 | E | + | | | 1 6 | F | = | | - | 5 4 | | (5) |
| - | 1 3 | C | + | | | 1 6 | E | | - | 5 6 | F | = | | - | 5 4 | | (6) |
|
Multiply both sides of equation (3) by 20 Divide the two sides of equation (3) by 3, the equation can be obtained: | | | 10 3 | C | | - | 20 3 | D | | -5 | E | | -5 | F | = | | - | 10 3 | (14) | , then add the two sides of equation (14) to both sides of equation (4), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| | | 2 3 | C | | - | 5 6 | E | + | | | 1 6 | F | = | | - | 5 4 | | (5) |
| - | 1 3 | C | + | | | 1 6 | E | | - | 5 6 | F | = | | - | 5 4 | | (6) |
|
Multiply both sides of equation (3) by 4 Divide the two sides of equation (3) by 3, the equation can be obtained: | | | 2 3 | C | | - | 4 3 | D | | -1 | E | | -1 | F | = | | - | 2 3 | (15) | , then subtract both sides of equation (15) from both sides of equation (5), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| | | 4 3 | D | + | | | 1 6 | E | + | | | 7 6 | F | = | | - | 7 12 | | (5) |
| - | 1 3 | C | + | | | 1 6 | E | | - | 5 6 | F | = | | - | 5 4 | | (6) |
|
Multiply both sides of equation (3) by 2 Divide the two sides of equation (3) by 3, the equation can be obtained: | | | 1 3 | C | | - | 2 3 | D | | - | 1 2 | E | | - | 1 2 | F | = | | - | 1 3 | (16) | , then add the two sides of equation (16) to both sides of equation (6), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| | | 4 3 | D | + | | | 1 6 | E | + | | | 7 6 | F | = | | - | 7 12 | | (5) |
| - | 2 3 | D | | - | 1 3 | E | | - | 4 3 | F | = | | - | 19 12 | | (6) |
|
Divide the two sides of equation (4) by 5, the equation can be obtained: | - | 4 3 | D | | - | 13 15 | E | | - | 16 15 | F | = | | - | 23 30 | (17) | , then add the two sides of equation (17) to both sides of equation (5), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| - | 7 10 | E | + | | | 1 10 | F | = | | - | 27 20 | | (5) |
| - | 2 3 | D | | - | 1 3 | E | | - | 4 3 | F | = | | - | 19 12 | | (6) |
|
Divide the two sides of equation (4) by 10, the equation can be obtained: | - | 2 3 | D | | - | 13 30 | E | | - | 8 15 | F | = | | - | 23 60 | (18) | , then subtract both sides of equation (18) from both sides of equation (6), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| - | 7 10 | E | + | | | 1 10 | F | = | | - | 27 20 | | (5) |
| |
Divide the two sides of equation (5) by 7, the equation can be obtained: | - | 1 10 | E | + | | | 1 70 | F | = | | - | 27 140 | (19) | , then add the two sides of equation (19) to both sides of equation (6), the equations are reduced to:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| - | 7 10 | E | + | | | 1 10 | F | = | | - | 27 20 | | (5) |
| |
Multiply both sides of equation (6) by 7 Divide both sides of equation (6) by 55, get the equation:, then add the two sides of equation (20) to both sides of equation (5), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | | - | 16 3 | F | = | | - | 23 6 | | (4) |
| | |
Multiply both sides of equation (6) by 224 Divide both sides of equation (6) by 33, get the equation:, then subtract both sides of equation (21) from both sides of equation (4), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | | 1 2 | C | | -1 | D | | - | 3 4 | E | | - | 3 4 | F | = | | - | 1 2 | | (3) |
| - | 20 3 | D | | - | 13 3 | E | = | | | 371 66 | | (4) |
| | |
Multiply both sides of equation (6) by 21 Divide both sides of equation (6) by 22, get the equation:, then subtract both sides of equation (22) from both sides of equation (3), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | 0 | | (2) |
| | - | 20 3 | D | | - | 13 3 | E | = | | | 371 66 | | (4) |
| | |
Multiply both sides of equation (6) by 7 Divide both sides of equation (6) by 11, get the equation:, then add the two sides of equation (23) to both sides of equation (2), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | + | | | 1 2 | F | = | | -1 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | = | | - | 39 44 | | (2) |
| | - | 20 3 | D | | - | 13 3 | E | = | | | 371 66 | | (4) |
| | |
Multiply both sides of equation (6) by 7 Divide both sides of equation (6) by 11, get the equation:, then add the two sides of equation (24) to both sides of equation (1), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | = | | - | 83 44 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | = | | - | 39 44 | | (2) |
| | - | 20 3 | D | | - | 13 3 | E | = | | | 371 66 | | (4) |
| | |
Multiply both sides of equation (5) by 130 Divide both sides of equation (5) by 21, get the equation:, then subtract both sides of equation (25) from both sides of equation (4), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | = | | - | 83 44 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | = | | - | 39 44 | | (2) |
| | | | |
Multiply both sides of equation (5) by 15 Divide both sides of equation (5) by 14, get the equation:, then subtract both sides of equation (26) from both sides of equation (3), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | = | | - | 83 44 | | (1) |
| -6 | B | | -1 | C | + | | | 1 2 | E | = | | - | 39 44 | | (2) |
| | | | |
Multiply both sides of equation (5) by 5 Divide both sides of equation (5) by 7, get the equation:, then add the two sides of equation (27) to both sides of equation (2), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | + | | | 1 2 | E | = | | - | 83 44 | | (1) |
| | | | | |
Multiply both sides of equation (5) by 5 Divide both sides of equation (5) by 7, get the equation:, then add the two sides of equation (28) to both sides of equation (1), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | = | | - | 131 44 | | (1) |
| | | | | |
Multiply both sides of equation (4) by 3 Divide both sides of equation (4) by 20, get the equation:, then subtract both sides of equation (29) from both sides of equation (3), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | = | | - | 131 44 | | (1) |
| | | | | |
Multiply both sides of equation (3) by 2, get the equation:, then add the two sides of equation (30) to both sides of equation (2), get the equation:
| | | -2 | A | | -2 | B | | -1 | C | = | | - | 131 44 | | (1) |
| | | | | |
Multiply both sides of equation (3) by 2, get the equation:, then add the two sides of equation (31) to both sides of equation (1), get the equation:
Divide both sides of equation (2) by 3, get the equation:, then subtract both sides of equation (32) from both sides of equation (1), get the equation:
The coefficient of the unknown number is reduced to 1, and the equations are reduced to:
Therefore, the solution of the equation set is:
Convert the solution of the equation set to decimals:
解方程组的详细方法请参阅:《多元一次方程组的解法》 |