| ( | x | − | 3 | ) | + | ( | x | + | 3 | ) | + | ( | x | ÷ | 3 | ) | + | ( | x | × | 3 | ) | = | 128 |
| 方程左边 = | x | − | 3 | + | ( | x | + | 3 | ) | + | ( | x | ÷ | 3 | ) | + | ( | x | × | 3 | ) |
| = | x | − | 3 | + | x | + | 3 | + | ( | x | ÷ | 3 | ) | + | ( | x | × | 3 | ) |
| = | 2 | x | − | 0 | + | ( | x | ÷ | 3 | ) | + | ( | x | × | 3 | ) |
| = | 2 | x | + | x | ÷ | 3 | + | ( | x | × | 3 | ) |
| = | 7 3 | x | + | ( | x | × | 3 | ) |
| = | 7 3 | x | + | x | × | 3 |
| = | 16 3 | x |
16 3 | x | = | 128 |
| x | = | 128 | ÷ | 16 3 |
| = | 128 | × | 3 16 |
| = | 8 | × | 3 |
| x | = | 24 |