| - | 8 | + | 4 | ( | 14 | + | 9 | ( | - | 2 | + | 2 | x | ) | ) | = | 16 | ( | 7 | x | + | 6 | ) |
| 方程左边 = | - | 8 | + | 4 | × | 14 | + | 4 | × | 9 | ( | - | 2 | + | 2 | x | ) |
| = | - | 8 | + | 56 | + | 36 | ( | - | 2 | + | 2 | x | ) |
| = | 48 | + | 36 | ( | - | 2 | + | 2 | x | ) |
| = | 48 | − | 36 | × | 2 | + | 36 | × | 2 | x |
| = | 48 | − | 72 | + | 72 | x |
| = | - | 24 | + | 72 | x |
| - | 24 | + | 72 | x | = | 16 | ( | 7 | x | + | 6 | ) |
| 方程右边 = | 16 | × | 7 | x | + | 16 | × | 6 |
| = | 112 | x | + | 96 |
| - | 24 | + | 72 | x | = | 112 | x | + | 96 |
| 72 | x | − | 112 | x | = | 96 | + | 24 |
| - | 40 | x | = | 96 | + | 24 |
| - | 40 | x | = | 120 |
| - | 120 | = | 40 | x |
| 40 | x | = | - | 120 |
| x | = | - | 120 | ÷ | 40 |
| = | - | 120 | × | 1 40 |
| = | - | 3 | × | 1 |
| x | = | - | 3 |