detailed information: The input equation set is:
| | | | | | 3 | A | + | | 27 | B | + | | 8 | C | + | | D | = | | 2 | | (3) |
| | 4 | A | + | | 64 | B | + | | 27 | C | + | | 8 | D | + | | E | = | | 5 | | (4) |
| | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
| Question solving process:
Multiply both sides of equation (1) by 2, the equation can be obtained: , then subtract both sides of equation (6) from both sides of equation (2), the equations are reduced to:
| | | | | | 3 | A | + | | 27 | B | + | | 8 | C | + | | D | = | | 2 | | (3) |
| | 4 | A | + | | 64 | B | + | | 27 | C | + | | 8 | D | + | | E | = | | 5 | | (4) |
| | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
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Multiply both sides of equation (1) by 3, the equation can be obtained: , then subtract both sides of equation (7) from both sides of equation (3), the equations are reduced to:
| | | | | | | 4 | A | + | | 64 | B | + | | 27 | C | + | | 8 | D | + | | E | = | | 5 | | (4) |
| | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
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Multiply both sides of equation (1) by 4, the equation can be obtained: , then subtract both sides of equation (8) from both sides of equation (4), the equations are reduced to:
| | | | | | | 60 | B | + | | 27 | C | + | | 8 | D | + | | E | = | | -7 | | (4) |
| | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
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Multiply both sides of equation (2) by 4, the equation can be obtained: , then subtract both sides of equation (9) from both sides of equation (3), the equations are reduced to:
| | | | | | | 60 | B | + | | 27 | C | + | | 8 | D | + | | E | = | | -7 | | (4) |
| | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
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Multiply both sides of equation (2) by 10, the equation can be obtained: , then subtract both sides of equation (10) from both sides of equation (4), the equations are reduced to:
| | | | | | | | 24 | B | + | | 18 | C | + | | 12 | D | + | | 6 | E | = | | 0 | | (5) |
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Multiply both sides of equation (2) by 4, the equation can be obtained: , then subtract both sides of equation (11) from both sides of equation (5), the equations are reduced to:
Multiply both sides of equation (3) by 17 Divide the two sides of equation (3) by 4, the equation can be obtained: , then subtract both sides of equation (12) from both sides of equation (4), the equations are reduced to:
Multiply both sides of equation (3) by 7 Divide the two sides of equation (3) by 2, the equation can be obtained: , then subtract both sides of equation (13) from both sides of equation (5), the equations are reduced to:
Multiply both sides of equation (4) by 34 Divide the two sides of equation (4) by 15, the equation can be obtained: | | | 17 2 | D | + | | | 34 15 | E | = | | - | 833 30 | (14) | , then subtract both sides of equation (14) from both sides of equation (5), the equations are reduced to:
Multiply both sides of equation (5) by 15 Divide both sides of equation (5) by 56, get the equation:, then subtract both sides of equation (15) from both sides of equation (4), get the equation:
Multiply both sides of equation (4) by 4 Divide both sides of equation (4) by 15, get the equation:, then subtract both sides of equation (16) from both sides of equation (3), get the equation:
Divide both sides of equation (3) by 4, get the equation:, then subtract both sides of equation (17) from both sides of equation (2), get the equation:
Divide both sides of equation (2) by 6, get the equation:, then subtract both sides of equation (18) 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》 |