| 3 | ( | 3 | ( | 3 | x | + | 17 | ) | + | 5 | ) | + | 15 | = | 6 | x | + | 151 |
| 方程左边 = | 3 | × | 3 | ( | 3 | x | + | 17 | ) | + | 3 | × | 5 | + | 15 |
| = | 9 | ( | 3 | x | + | 17 | ) | + | 15 | + | 15 |
| = | 9 | ( | 3 | x | + | 17 | ) | + | 30 |
| = | 9 | × | 3 | x | + | 9 | × | 17 | + | 30 |
| = | 27 | x | + | 153 | + | 30 |
| = | 27 | x | + | 183 |
| 27 | x | + | 183 | = | 6 | x | + | 151 |
| 27 | x | − | 6 | x | = | 151 | − | 183 |
| 21 | x | = | 151 | − | 183 |
| 21 | x | = | - | 32 |
| x | = | - | 32 | ÷ | 21 |
| = | - | 32 | × | 1 21 |
| x | = | - | 32 21 |
| x | = | - 1.52381 |