| 2 | X | + | 9 | ( | 50 | − | X | ) | × | 3 2 | = | 88 |
| 方程左边 = | 2 | X | + | 27 2 | ( | 50 | − | X | ) |
| 2 | X | + | 27 2 | ( | 50 | − | X | ) | = | 88 |
| 方程左边 = | 2 | X | + | 27 2 | × | 50 | − | 27 2 | X |
| = | 2 | X | + | 675 | − | 27 2 | X |
| = | - | 23 2 | X | + | 675 |
| - | 23 2 | X | + | 675 | = | 88 |
| - | 23 2 | X | = | 88 | − | 675 |
| - | 23 2 | X | = | - | 587 |
| 587 | = | 23 2 | X |
23 2 | X | = | 587 |
| X | = | 587 | ÷ | 23 2 |
| = | 587 | × | 2 23 |
| X | = | 1174 23 |
| X | = | 51.043478 |