| x | = | - | ( | - | 9 | ÷ | 4 | + | 1 | ÷ | 8 | ) | ÷ | ( | - | 3 | ÷ | 8 | ) | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) |
| 方程两边同时乘以: | ( | - | 3 | ÷ | 8 | ) |
| x | ( | - | 3 | ÷ | 8 | ) | = | - | ( | - | 9 | ÷ | 4 | + | 1 | ÷ | 8 | ) | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | x | × | 3 | ÷ | 8 | = | - | ( | - | 9 | ÷ | 4 | + | 1 | ÷ | 8 | ) | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | x | × | 3 | ÷ | 8 | = | 9 | ÷ | 4 | − | 1 | ÷ | 8 | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | x | × | 3 8 | = | 9 4 | − | 1 8 | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | + | ( | - | 3 | ÷ | 5 | ) | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | − | 3 | ÷ | 5 | × | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | − | 3 5 | ( | - | 25 | ÷ | 9 | ) | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | + | 3 5 | × | 25 | ÷ | 9 | × | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | + | 5 3 | ( | - | 3 | ÷ | 8 | ) |
| - | 3 8 | x | = | 17 8 | − | 5 3 | × | 3 | ÷ | 8 |
| - | 3 8 | x | = | 17 8 | − | 5 8 |
| - | 3 8 | x | = | 3 2 |
| - | 3 2 | = | 3 8 | x |
3 8 | x | = | - | 3 2 |
| x | = | - | 3 2 | ÷ | 3 8 |
| = | - | 3 2 | × | 8 3 |
| = | - | 1 | × | 4 |
| x | = | - | 4 |