| 8 | ( | 18 | x | − | 2 | ) | − | 6 | ( | 16 | x | + | 5 | ) | − | 6 | = | - | 4 |
| 方程左边 = | 8 | × | 18 | x | − | 8 | × | 2 | − | 6 | ( | 16 | x | + | 5 | ) | − | 6 |
| = | 144 | x | − | 16 | − | 6 | ( | 16 | x | + | 5 | ) | − | 6 |
| = | 144 | x | − | 22 | − | 6 | ( | 16 | x | + | 5 | ) |
| = | 144 | x | − | 22 | − | 6 | × | 16 | x | − | 6 | × | 5 |
| = | 144 | x | − | 22 | − | 96 | x | − | 30 |
| = | 48 | x | − | 52 |
| 48 | x | − | 52 | = | - | 4 |
| 48 | x | = | - | 4 | + | 52 |
| 48 | x | = | 48 |
| x | = | 48 | ÷ | 48 |
| = | 48 | × | 1 48 |
| = | 1 | × | 1 |
| x | = | 1 |