| ( | 1 | − | 5 | ÷ | 9 | ) | X | + | 8 | = | 3 | ÷ | 4 | × | X | − | 3 |
| 方程左边 = | 1 | X | − | 5 | ÷ | 9 | × | X | + | 8 |
| = | 1 | X | − | 5 9 | X | + | 8 |
| = | 4 9 | X | + | 8 |
4 9 | X | + | 8 | = | 3 | ÷ | 4 | × | X | − | 3 |
| 方程右边 = | 3 4 | X | − | 3 |
4 9 | X | + | 8 | = | 3 4 | X | − | 3 |
4 9 | X | − | 3 4 | X | = | - | 3 | − | 8 |
| - | 11 36 | X | = | - | 3 | − | 8 |
| - | 11 36 | X | = | - | 11 |
| 11 | = | 11 36 | X |
11 36 | X | = | 11 |
| X | = | 11 | ÷ | 11 36 |
| = | 11 | × | 36 11 |
| = | 1 | × | 36 |
| X | = | 36 |