| 16 | − | ( | 4 | + | 4 | ( | - | 1 | + | 2 | x | ) | ) | = | 16 | ( | x | + | 4 | ) |
| 方程左边 = | 16 | − | 4 | − | 4 | ( | - | 1 | + | 2 | x | ) |
| = | 12 | − | 4 | ( | - | 1 | + | 2 | x | ) |
| = | 12 | + | 4 | × | 1 | − | 4 | × | 2 | x |
| = | 12 | + | 4 | − | 8 | x |
| = | 16 | − | 8 | x |
| 16 | − | 8 | x | = | 16 | ( | x | + | 4 | ) |
| 方程右边 = | 16 | x | + | 16 | × | 4 |
| = | 16 | x | + | 64 |
| 16 | − | 8 | x | = | 16 | x | + | 64 |
| - | 8 | x | − | 16 | x | = | 64 | − | 16 |
| - | 24 | x | = | 64 | − | 16 |
| - | 24 | x | = | 48 |
| - | 48 | = | 24 | x |
| 24 | x | = | - | 48 |
| x | = | - | 48 | ÷ | 24 |
| = | - | 48 | × | 1 24 |
| = | - | 2 | × | 1 |
| x | = | - | 2 |