| 3 | ( | 3 | ( | 2 | ( | 2 | x | + | 9 | ) | + | 2 | ) | + | 3 | ) | + | 19 | = | 8 | x | − | 44 |
| 方程左边 = | 3 | × | 3 | ( | 2 | ( | 2 | x | + | 9 | ) | + | 2 | ) | + | 3 | × | 3 | + | 19 |
| = | 9 | ( | 2 | ( | 2 | x | + | 9 | ) | + | 2 | ) | + | 9 | + | 19 |
| = | 9 | ( | 2 | ( | 2 | x | + | 9 | ) | + | 2 | ) | + | 28 |
| = | 9 | × | 2 | ( | 2 | x | + | 9 | ) | + | 9 | × | 2 | + | 28 |
| = | 18 | ( | 2 | x | + | 9 | ) | + | 18 | + | 28 |
| = | 18 | ( | 2 | x | + | 9 | ) | + | 46 |
| = | 18 | × | 2 | x | + | 18 | × | 9 | + | 46 |
| = | 36 | x | + | 162 | + | 46 |
| = | 36 | x | + | 208 |
| 36 | x | + | 208 | = | 8 | x | − | 44 |
| 36 | x | − | 8 | x | = | - | 44 | − | 208 |
| 28 | x | = | - | 44 | − | 208 |
| 28 | x | = | - | 252 |
| x | = | - | 252 | ÷ | 28 |
| = | - | 252 | × | 1 28 |
| = | - | 9 | × | 1 |
| x | = | - | 9 |