| - | 3 | + | 13 | ( | 5 | + | 4 | ( | 9 | + | x | ) | ) | = | 14 | ( | x | + | 8 | ) |
| 方程左边 = | - | 3 | + | 13 | × | 5 | + | 13 | × | 4 | ( | 9 | + | x | ) |
| = | - | 3 | + | 65 | + | 52 | ( | 9 | + | x | ) |
| = | 62 | + | 52 | ( | 9 | + | x | ) |
| = | 62 | + | 52 | × | 9 | + | 52 | x |
| = | 62 | + | 468 | + | 52 | x |
| = | 530 | + | 52 | x |
| 530 | + | 52 | x | = | 14 | ( | x | + | 8 | ) |
| 方程右边 = | 14 | x | + | 14 | × | 8 |
| = | 14 | x | + | 112 |
| 530 | + | 52 | x | = | 14 | x | + | 112 |
| 52 | x | − | 14 | x | = | 112 | − | 530 |
| 38 | x | = | 112 | − | 530 |
| 38 | x | = | - | 418 |
| x | = | - | 418 | ÷ | 38 |
| = | - | 418 | × | 1 38 |
| = | - | 11 | × | 1 |
| x | = | - | 11 |