5 2 | x | + | ( | 4 | ÷ | 5 | ) | = | 3 | x | − | ( | 3 | ÷ | 4 | ) |
| 方程左边 = | 5 2 | x | + | 4 | ÷ | 5 |
| = | 5 2 | x | + | 4 5 |
5 2 | x | + | 4 5 | = | 3 | x | − | ( | 3 | ÷ | 4 | ) |
| 方程右边 = | 3 | x | − | 3 | ÷ | 4 |
| = | 3 | x | − | 3 4 |
5 2 | x | + | 4 5 | = | 3 | x | − | 3 4 |
5 2 | x | − | 3 | x | = | - | 3 4 | − | 4 5 |
| - | 1 2 | x | = | - | 3 4 | − | 4 5 |
| - | 1 2 | x | = | - | 31 20 |
31 20 | = | 1 2 | x |
1 2 | x | = | 31 20 |
| x | = | 31 20 | ÷ | 1 2 |
| = | 31 20 | × | 2 |
| = | 31 10 | × | 1 |
| x | = | 31 10 |
| x | = | 3.1 |