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On line solution of multivariate equations：
    First set the elements of the equation (i.e. the number of unknowns), then click the "Next" button to enter the coefficients of each element of the equation set, and click the "Next" button to obtain the solution of the equation set.
    Note that the coefficients of each element of the equation system can only be numbers, not algebraic expressions (including mathematical functions).
    Current location：Equations > Multivariate equations > Answer
detailed information：
The input equation set is:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
- 
35
2
A + 
51
2
B + 
21
2
C = -14    (2)
- 
5
2
A + 
21
2
B + 
25
2
C = -14    (3)
 
3
2
A -1B = 0    (4)
Question solving process:

Multiply both sides of equation (1) by 35
Divide the two sides of equation (1) by 43, the equation can be obtained:
         
35
2
A - 
1225
86
B - 
175
86
C = 0    (5)
, then add the two sides of equation (5) to both sides of equation (2), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
- 
5
2
A + 
21
2
B + 
25
2
C = -14    (3)
 
3
2
A -1B = 0    (4)

Multiply both sides of equation (1) by 5
Divide the two sides of equation (1) by 43, the equation can be obtained:
         
5
2
A - 
175
86
B - 
25
86
C = 0    (6)
, then add the two sides of equation (6) to both sides of equation (3), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
 
364
43
B + 
525
43
C = -14    (3)
 
3
2
A -1B = 0    (4)

Multiply both sides of equation (1) by 3
Divide the two sides of equation (1) by 43, the equation can be obtained:
         
3
2
A - 
105
86
B - 
15
86
C = 0    (7)
, then subtract both sides of equation (7) from both sides of equation (4), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
 
364
43
B + 
525
43
C = -14    (3)
 
19
86
B + 
15
86
C = 0    (4)

Multiply both sides of equation (2) by 91
Divide the two sides of equation (2) by 121, the equation can be obtained:
         
364
43
B + 
33124
5203
C = - 
1274
121
    (8)
, then subtract both sides of equation (8) from both sides of equation (3), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
 
707
121
C = - 
420
121
    (3)
 
19
86
B + 
15
86
C = 0    (4)

Multiply both sides of equation (2) by 19
Divide the two sides of equation (2) by 968, the equation can be obtained:
         
19
86
B + 
1729
10406
C = - 
133
484
    (9)
, then subtract both sides of equation (9) from both sides of equation (4), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
 
707
121
C = - 
420
121
    (3)
 
1
121
C = 
133
484
    (4)

Divide the two sides of equation (3) by 707, the equation can be obtained:
         
101
12221
C = - 
60
12221
    (10)
, then subtract both sides of equation (10) from both sides of equation (4), the equations are reduced to:
 
43
2
A - 
35
2
B - 
5
2
C = 0    (1)
 
484
43
B + 
364
43
C = -14    (2)
 
707
121
C = - 
420
121
    (3)
0 = 
113
404
    (4)

由第(4)方程式可以看出，该方程组无解。

解方程组的详细方法请参阅：《多元一次方程组的解法》
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