| ( | - | 3 | ) | ( | - | 117 | + | 3 | ( | - | 16 | − | 3 | x | ) | ) | + | 1 | = | - | 2 |
| 方程左边 = | - | 3 | ( | - | 117 | + | 3 | ( | - | 16 | − | 3 | x | ) | ) | + | 1 |
| = | 3 | × | 117 | − | 3 | × | 3 | ( | - | 16 | − | 3 | x | ) | + | 1 |
| = | 351 | − | 9 | ( | - | 16 | − | 3 | x | ) | + | 1 |
| = | 352 | − | 9 | ( | - | 16 | − | 3 | x | ) |
| = | 352 | + | 9 | × | 16 | + | 9 | × | 3 | x |
| = | 352 | + | 144 | + | 27 | x |
| = | 496 | + | 27 | x |
| 496 | + | 27 | x | = | - | 2 |
| 27 | x | = | - | 2 | − | 496 |
| 27 | x | = | - | 498 |
| x | = | - | 498 | ÷ | 27 |
| = | - | 498 | × | 1 27 |
| = | - | 166 | × | 1 9 |
| x | = | - | 166 9 |
| x | = | - 18.444444 |