| 14 | + | 2 | ( | - | 1 | + | 11 | ( | 9 | + | x | ) | ) | = | 2 | ( | 4 | x | − | 7 | ) |
| 方程左边 = | 14 | − | 2 | × | 1 | + | 2 | × | 11 | ( | 9 | + | x | ) |
| = | 14 | − | 2 | + | 22 | ( | 9 | + | x | ) |
| = | 12 | + | 22 | ( | 9 | + | x | ) |
| = | 12 | + | 22 | × | 9 | + | 22 | x |
| = | 12 | + | 198 | + | 22 | x |
| = | 210 | + | 22 | x |
| 210 | + | 22 | x | = | 2 | ( | 4 | x | − | 7 | ) |
| 方程右边 = | 2 | × | 4 | x | − | 2 | × | 7 |
| = | 8 | x | − | 14 |
| 210 | + | 22 | x | = | 8 | x | − | 14 |
| 22 | x | − | 8 | x | = | - | 14 | − | 210 |
| 14 | x | = | - | 14 | − | 210 |
| 14 | x | = | - | 224 |
| x | = | - | 224 | ÷ | 14 |
| = | - | 224 | × | 1 14 |
| = | - | 16 | × | 1 |
| x | = | - | 16 |