| ( | x | − | 1 | ) | ÷ | ( | x | + | 1 | ) | + | ( | 2 | x | ) | ÷ | ( | 1 | − | 2 | x | ) | = | 0 |
| 方程两边同时乘以: | ( | x | + | 1 | ) |
| ( | x | − | 1 | ) | + | ( | 2 | x | ) | ÷ | ( | 1 | − | 2 | x | ) | × | ( | x | + | 1 | ) | = | 0 |
| x | − | 1 | + | ( | 2 | x | ) | ÷ | ( | 1 | − | 2 | x | ) | × | ( | x | + | 1 | ) | = | 0 |
| 方程两边同时乘以: | ( | 1 | − | 2 | x | ) |
| x | ( | 1 | − | 2 | x | ) | − | 1 | ( | 1 | − | 2 | x | ) | + | ( | 2 | x | ) | ( | x | + | 1 | ) | = | 0 |
| x | × | 1 | − | x | × | 2 | x | − | 1 | ( | 1 | − | 2 | x | ) | + | ( | 2 | x | ) | ( | x | + | 1 | ) | = | 0 |
| 1 | x | − | x | × | 2 | x | − | 1 | × | 1 | + | 1 | × | 2 | x | + | ( | 2 | x | ) | ( | x | + | 1 | ) | = | 0 |
| 1 | x | − | x | × | 2 | x | − | 1 | + | 2 | x | + | ( | 2 | x | ) | ( | x | + | 1 | ) | = | 0 |
| 3 | x | − | x | × | 2 | x | − | 1 | + | ( | 2 | x | ) | ( | x | + | 1 | ) | = | 0 |
| 3 | x | − | x | × | 2 | x | − | 1 | + | 2 | x | ( | x | + | 1 | ) | = | 0 |
| 3 | x | − | x | × | 2 | x | − | 1 | + | 2 | x | x | + | 2 | x | × | 1 | = | 0 |
| 3 | x | − | x | × | 2 | x | − | 1 | + | 2 | x | x | + | 2 | x | = | 0 |
| 5 | x | − | x | × | 2 | x | − | 1 | + | 2 | x | x | = | 0 |
| x1= | 1 5 |