| 6 | ( | - | x | + | 5 | ) | − | 2 | ( | x | + | 4 | ) | = | 16 | ( | x | − | 5 | ) | + | 54 |
| 方程左边 = | - | 6 | x | + | 6 | × | 5 | − | 2 | ( | x | + | 4 | ) |
| = | - | 6 | x | + | 30 | − | 2 | ( | x | + | 4 | ) |
| = | - | 6 | x | + | 30 | − | 2 | x | − | 2 | × | 4 |
| = | - | 6 | x | + | 30 | − | 2 | x | − | 8 |
| = | - | 8 | x | + | 22 |
| - | 8 | x | + | 22 | = | 16 | ( | x | − | 5 | ) | + | 54 |
| 方程右边 = | 16 | x | − | 16 | × | 5 | + | 54 |
| = | 16 | x | − | 80 | + | 54 |
| = | 16 | x | − | 26 |
| - | 8 | x | + | 22 | = | 16 | x | − | 26 |
| - | 8 | x | − | 16 | x | = | - | 26 | − | 22 |
| - | 24 | x | = | - | 26 | − | 22 |
| - | 24 | x | = | - | 48 |
| 48 | = | 24 | x |
| 24 | x | = | 48 |
| x | = | 48 | ÷ | 24 |
| = | 48 | × | 1 24 |
| = | 2 | × | 1 |
| x | = | 2 |