| 3 | − | 6 | ( | ( | 1 | ÷ | 3 | ) | x | − | 2 | ) | = | 2 | − | ( | 5 | − | ( | 1 | ÷ | 2 | ) | x | ) |
| 方程左边 = | 3 | − | 6 | ( | 1 | ÷ | 3 | ) | x | + | 6 | × | 2 |
| = | 3 | − | 6 | ( | 1 | ÷ | 3 | ) | x | + | 12 |
| = | 15 | − | 6 | ( | 1 | ÷ | 3 | ) | x |
| = | 15 | − | 6 | × | 1 | ÷ | 3 | × | x |
| = | 15 | − | 2 | x |
| 15 | − | 2 | x | = | 2 | − | ( | 5 | − | ( | 1 | ÷ | 2 | ) | x | ) |
| 方程右边 = | 2 | − | 5 | + | ( | 1 | ÷ | 2 | ) | x |
| = | - | 3 | + | ( | 1 | ÷ | 2 | ) | x |
| = | - | 3 | + | 1 | ÷ | 2 | × | x |
| = | - | 3 | + | 1 2 | x |
| 15 | − | 2 | x | = | - | 3 | + | 1 2 | x |
| - | 2 | x | − | 1 2 | x | = | - | 3 | − | 15 |
| - | 5 2 | x | = | - | 3 | − | 15 |
| - | 5 2 | x | = | - | 18 |
| 18 | = | 5 2 | x |
5 2 | x | = | 18 |
| x | = | 18 | ÷ | 5 2 |
| = | 18 | × | 2 5 |
| x | = | 36 5 |
| x | = | 7.2 |