| X | ÷ | 126 | + | 20 | ÷ | 131 | − | ( | 75 | − | X | ) | ÷ | 1000 | = | 131 250 |
| 方程左边 = | X | × | 1 126 | + | 20 131 | − | ( | 75 | − | X | ) | × | 1 1000 |
1 126 | X | + | 20 131 | − | ( | 75 | − | X | ) | × | 1 1000 | = | 131 250 |
| 方程左边 = | 1 126 | X | + | 20 131 | − | 75 | × | 1 1000 | + | X | × | 1 1000 |
| = | 1 126 | X | + | 20 131 | − | 3 40 | + | X | × | 1 1000 |
| = | 563 63000 | X | + | 407 5240 |
563 63000 | X | + | 407 5240 | = | 131 250 |
563 63000 | X | = | 131 250 | − | 407 5240 |
563 63000 | X | = | 58469 131000 |
| X | = | 58469 131000 | ÷ | 563 63000 |
| = | 58469 131000 | × | 63000 563 |
| = | 58469 131 | × | 63 563 |
| X | = | 3683547 73753 |
| X | = | 49.944368 |