| 1 | ÷ | ( | x | + | 1 | ) | = | 1 | ÷ | x | + | 1 | ÷ | ( | x | − | 1 | ) | + | 1 | ÷ | ( | x | + | 4 | ) |
| 方程两边同时乘以: | ( | x | + | 1 | ) | , | x |
| 1 | x | = | 1 | ( | x | + | 1 | ) | + | 1 | ÷ | ( | x | − | 1 | ) | × | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) | × | ( | x | + | 1 | ) | x |
| 1 | x | = | 1 | x | + | 1 | × | 1 | + | 1 | ÷ | ( | x | − | 1 | ) | × | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) | × | ( | x | + | 1 | ) | x |
| 1 | x | = | 1 | x | + | 1 | + | 1 | ÷ | ( | x | − | 1 | ) | × | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) | × | ( | x | + | 1 | ) | x |
| 方程两边同时乘以: | ( | x | − | 1 | ) |
| 1 | x | ( | x | − | 1 | ) | = | 1 | x | ( | x | − | 1 | ) | + | 1 | ( | x | − | 1 | ) | + | 1 | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) | × | ( | x | + | 1 | ) | x |
| 1 | x | x | − | 1 | x | × | 1 | = | 1 | x | ( | x | − | 1 | ) | + | 1 | ( | x | − | 1 | ) | + | 1 | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) | × | ( | x | + | 1 | ) | x |
| 1 | x | x | − | 1 | x | × | 1 | = | 1 | x | x | − | 1 | x | × | 1 | + | 1 | ( | x | − | 1 | ) | + | 1 | ( | x | + | 1 | ) | x | + | 1 |
| 1 | x | x | − | 1 | x | = | 1 | x | x | − | 1 | x | + | 1 | ( | x | − | 1 | ) | + | 1 | ( | x | + | 1 | ) | x | + | 1 | ÷ | ( | x | + | 4 | ) |
| 方程两边同时乘以: | ( | x | + | 4 | ) |
| 1 | x | x | ( | x | + | 4 | ) | − | 1 | x | ( | x | + | 4 | ) | = | 1 | x | x | ( | x | + | 4 | ) | − | 1 | x | ( | x | + | 4 | ) | + | 1 | ( | x | − | 1 | ) | ( | x | + | 4 | ) | + | 1 | ( | x | + | 1 | ) |
| 1 | x | x | x | + | 1 | x | x | × | 4 | − | 1 | x | ( | x | + | 4 | ) | = | 1 | x | x | ( | x | + | 4 | ) | − | 1 | x | ( | x | + | 4 | ) | + | 1 | ( | x | − | 1 | ) | ( | x | + | 4 | ) | + | 1 | ( | x | + | 1 | ) |
| 1 | x | x | x | + | 1 | x | x | × | 4 | − | 1 | x | ( | x | + | 4 | ) | = | 1 | x | x | x | + | 1 | x | x | × | 4 | − | 1 | x | ( | x | + | 4 | ) | + | 1 |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | ( | x | + | 4 | ) | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | ( | x | + | 4 | ) | + | 1 | ( | x | − | 1 | ) |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 1 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | ( | x | + | 4 | ) | + | 1 | ( | x | − | 1 | ) |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 1 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 1 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 0 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | + | 1 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | + | 1 | x |
| 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | − | 4 | x | = | 1 | x | x | x | + | 4 | x | x | − | 1 | x | x | + | 1 | x |