| ( | 2 | − | X | − | 160573 2500 | ) | ÷ | 2 | = | 17 5 |
| 方程左边 = | 2 | × | 1 2 | − | X | × | 1 2 | − | 160573 2500 | × | 1 2 |
| = | 1 | − | X | × | 1 2 | − | 160573 5000 |
| = | - | 155573 5000 | − | 1 2 | X |
| - | 155573 5000 | − | 1 2 | X | = | 17 5 |
| - | 1 2 | X | = | 17 5 | + | 155573 5000 |
| - | 1 2 | X | = | 172573 5000 |
| - | 172573 5000 | = | 1 2 | X |
1 2 | X | = | - | 172573 5000 |
| X | = | - | 172573 5000 | ÷ | 1 2 |
| = | - | 172573 5000 | × | 2 |
| = | - | 172573 2500 | × | 1 |
| X | = | - | 172573 2500 |
| X | = | - 69.0292 |