| ( | 900 | − | 56 | X | ) | ÷ | 24 | = | ( | 1250 | − | 30 | X | ) | ÷ | 62 |
| 方程左边 = | 900 | × | 1 24 | − | 56 | X | × | 1 24 |
| = | 75 2 | − | 7 3 | X |
75 2 | − | 7 3 | X | = | ( | 1250 | − | 30 | X | ) | ÷ | 62 |
| 方程右边 = | 1250 | × | 1 62 | − | 30 | X | × | 1 62 |
| = | 625 31 | − | 15 31 | X |
75 2 | − | 7 3 | X | = | 625 31 | − | 15 31 | X |
| - | 7 3 | X | + | 15 31 | X | = | 625 31 | − | 75 2 |
| - | 172 93 | X | = | 625 31 | − | 75 2 |
| - | 172 93 | X | = | - | 1075 62 |
1075 62 | = | 172 93 | X |
172 93 | X | = | 1075 62 |
| X | = | 1075 62 | ÷ | 172 93 |
| = | 1075 62 | × | 93 172 |
| = | 1075 2 | × | 3 172 |
| X | = | 3225 344 |
| X | = | 75 8 |
| X | = | 9.375 |