| ( | X | − | 3224 | − | 5000 | ) | × | 1 5 | = | X | − | 119154 5 | − | 3224 |
| 方程左边 = | X | × | 1 5 | − | 3224 | × | 1 5 | − | 5000 | × | 1 5 |
| = | X | × | 1 5 | − | 3224 5 | − | 1000 |
| = | 1 5 | X | − | 8224 5 |
1 5 | X | − | 8224 5 | = | X | − | 119154 5 | − | 3224 |
| 方程右边 = | X | − | 135274 5 |
1 5 | X | − | 8224 5 | = | X | − | 135274 5 |
1 5 | X | − | X | = | - | 135274 5 | + | 8224 5 |
| - | 4 5 | X | = | - | 135274 5 | + | 8224 5 |
| - | 4 5 | X | = | - | 25410 |
| 25410 | = | 4 5 | X |
4 5 | X | = | 25410 |
| X | = | 25410 | ÷ | 4 5 |
| = | 25410 | × | 5 4 |
| = | 12705 | × | 5 2 |
| X | = | 63525 2 |
| X | = | 31762.5 |