87 50 | = | 18 | ÷ | ( | 573 50 | + | X | ) | ÷ | 2 |
| 方程两边同时乘以: | ( | 573 50 | + | X | ) |
87 50 | ( | 573 50 | + | X | ) | = | 18 | ÷ | 2 |
87 50 | × | 573 50 | + | 87 50 | X | = | 18 | ÷ | 2 |
49851 2500 | + | 87 50 | X | = | 9 |
87 50 | X | = | 9 | − | 49851 2500 |
87 50 | X | = | - | 27351 2500 |
| X | = | - | 27351 2500 | ÷ | 87 50 |
| = | - | 27351 2500 | × | 50 87 |
| = | - | 9117 50 | × | 1 29 |
| X | = | - | 9117 1450 |
| X | = | - 6.287586 |