| ( | 1 | + | 1 | ÷ | 5 | × | x | − | 2 | ) | ( | x | − | 3 10 | ) | = | 3 5 |
| 方程左边 = | 1 | ( | x | − | 3 10 | ) | + | 1 | ÷ | 5 | × | x | ( | x | − | 3 10 | ) | − | 2 | ( | x | − | 3 10 | ) |
| = | 1 | ( | x | − | 3 10 | ) | + | 1 5 | x | ( | x | − | 3 10 | ) | − | 2 | ( | x | − | 3 10 | ) |
| = | 1 | x | − | 1 | × | 3 10 | + | 1 5 | x | ( | x | − | 3 10 | ) | − | 2 | ( | x | − | 3 10 | ) |
| = | 1 | x | − | 3 10 | + | 1 5 | x | ( | x | − | 3 10 | ) | − | 2 | ( | x | − | 3 10 | ) |
| = | 1 | x | − | 3 10 | + | 1 5 | x | x | − | 1 5 | x | × | 3 10 | − | 2 | ( | x | − | 3 10 | ) |
| = | 1 | x | − | 3 10 | + | 1 5 | x | x | − | 3 50 | x | − | 2 | ( | x | − | 3 10 | ) |
| = | 47 50 | x | − | 3 10 | + | 1 5 | x | x | − | 2 | ( | x | − | 3 10 | ) |
| = | 47 50 | x | − | 3 10 | + | 1 5 | x | x | − | 2 | x | + | 2 | × | 3 10 |
| = | 47 50 | x | − | 3 10 | + | 1 5 | x | x | − | 2 | x | + | 3 5 |
| = | - | 53 50 | x | + | 3 10 | + | 1 5 | x | x |
| - | 53 50 | x | + | 3 10 | + | 1 5 | x | x | = | 3 5 |