| ( | ( | x | + | 8 | ) | ÷ | 1 5 | ) | − | ( | ( | x | − | 3 | ) | ÷ | 1 2 | ) | = | 6 5 | − | ( | x | + | 16 | ) | ÷ | 5 |
| 方程左边 = | ( | x | + | 8 | ) | ÷ | 1 5 | − | ( | ( | x | − | 3 | ) | ÷ | 1 2 | ) |
| = | x | × | 5 | + | 8 | × | 5 | − | ( | ( | x | − | 3 | ) | ÷ | 1 2 | ) |
| = | x | × | 5 | + | 40 | − | ( | ( | x | − | 3 | ) | ÷ | 1 2 | ) |
| = | 5 | x | + | 40 | − | ( | x | − | 3 | ) | ÷ | 1 2 |
| = | 5 | x | + | 40 | − | x | × | 2 | + | 3 | × | 2 |
| = | 5 | x | + | 40 | − | x | × | 2 | + | 6 |
| = | 3 | x | + | 46 |
| 3 | x | + | 46 | = | 6 5 | − | ( | x | + | 16 | ) | ÷ | 5 |
| 方程右边 = | 6 5 | − | x | × | 1 5 | − | 16 | × | 1 5 |
| = | 6 5 | − | x | × | 1 5 | − | 16 5 |
| = | - | 2 | − | 1 5 | x |
| 3 | x | + | 46 | = | - | 2 | − | 1 5 | x |
| 3 | x | + | 1 5 | x | = | - | 2 | − | 46 |
16 5 | x | = | - | 2 | − | 46 |
16 5 | x | = | - | 48 |
| x | = | - | 48 | ÷ | 16 5 |
| = | - | 48 | × | 5 16 |
| = | - | 3 | × | 5 |
| x | = | - | 15 |