| 5 | ( | - | 2 | ( | 16 | ( | x | + | 19 | ) | + | 2 | ) | + | 9 | ) | + | 4 | = | 13 | ( | x | + | 15 | ) | − | 92 |
| 方程左边 = | - | 5 | × | 2 | ( | 16 | ( | x | + | 19 | ) | + | 2 | ) | + | 5 | × | 9 | + | 4 |
| = | - | 10 | ( | 16 | ( | x | + | 19 | ) | + | 2 | ) | + | 45 | + | 4 |
| = | - | 10 | ( | 16 | ( | x | + | 19 | ) | + | 2 | ) | + | 49 |
| = | - | 10 | × | 16 | ( | x | + | 19 | ) | − | 10 | × | 2 | + | 49 |
| = | - | 160 | ( | x | + | 19 | ) | − | 20 | + | 49 |
| = | - | 160 | ( | x | + | 19 | ) | + | 29 |
| = | - | 160 | x | − | 160 | × | 19 | + | 29 |
| = | - | 160 | x | − | 3040 | + | 29 |
| = | - | 160 | x | − | 3011 |
| - | 160 | x | − | 3011 | = | 13 | ( | x | + | 15 | ) | − | 92 |
| 方程右边 = | 13 | x | + | 13 | × | 15 | − | 92 |
| = | 13 | x | + | 195 | − | 92 |
| = | 13 | x | + | 103 |
| - | 160 | x | − | 3011 | = | 13 | x | + | 103 |
| - | 160 | x | − | 13 | x | = | 103 | + | 3011 |
| - | 173 | x | = | 103 | + | 3011 |
| - | 173 | x | = | 3114 |
| - | 3114 | = | 173 | x |
| 173 | x | = | - | 3114 |
| x | = | - | 3114 | ÷ | 173 |
| = | - | 3114 | × | 1 173 |
| x | = | - | 3114 173 |
| x | = | - | 18 |