| X | ÷ | 1250 | = | ( | X | − | 1701 10 | ) | ÷ | 800 |
| 方程右边 = | X | × | 1 800 | − | 1701 10 | × | 1 800 |
| = | X | × | 1 800 | − | 1701 8000 |
1 1250 | X | = | 1 800 | X | − | 1701 8000 |
1 1250 | X | − | 1 800 | X | = | - | 1701 8000 |
| - | 9 20000 | X | = | - | 1701 8000 |
1701 8000 | = | 9 20000 | X |
9 20000 | X | = | 1701 8000 |
| X | = | 1701 8000 | ÷ | 9 20000 |
| = | 1701 8000 | × | 20000 9 |
| = | 189 2 | × | 5 |
| X | = | 945 2 |
| X | = | 472.5 |