| ( | 2 | ( | - | 9 100 | ) | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | ) | ÷ | ( | x | + | 1 | ) | = | - | 3 20 |
| 方程两边同时乘以: | ( | x | + | 1 | ) |
| ( | 2 | ( | - | 9 100 | ) | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | ) | = | - | 3 20 | ( | x | + | 1 | ) |
| 2 | ( | - | 9 100 | ) | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | = | - | 3 20 | ( | x | + | 1 | ) |
| 2 | ( | - | 9 100 | ) | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 | × | 1 |
| 2 | ( | - | 9 100 | ) | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 |
| - | 2 | × | 9 100 | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 |
| - | 9 50 | + | ( | x | − | 1 | ) | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 |
| - | 9 50 | + | x | ( | - | 3 50 | ) | − | 1 | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 |
| - | 9 50 | − | x | × | 3 50 | − | 1 | ( | - | 3 50 | ) | = | - | 3 20 | x | − | 3 20 |
| - | 9 50 | − | 3 50 | x | + | 1 | × | 3 50 | = | - | 3 20 | x | − | 3 20 |
| - | 9 50 | − | 3 50 | x | + | 3 50 | = | - | 3 20 | x | − | 3 20 |
| - | 3 25 | − | 3 50 | x | = | - | 3 20 | x | − | 3 20 |
| - | 3 50 | x | + | 3 20 | x | = | - | 3 20 | + | 3 25 |
9 100 | x | = | - | 3 20 | + | 3 25 |
9 100 | x | = | - | 3 100 |
| x | = | - | 3 100 | ÷ | 9 100 |
| = | - | 3 100 | × | 100 9 |
| = | - | 1 | × | 1 3 |
| x | = | - | 1 3 |
| x | = | - 0.333333 |