| 1 | ÷ | ( | 13 | − | 2 | x | ) | + | 1 | ÷ | x | = | 0 |
| 方程两边同时乘以: | ( | 13 | − | 2 | x | ) |
| 1 | + | 1 | ÷ | x | × | ( | 13 | − | 2 | x | ) | = | 0 |
| 1 | + | 1 | ÷ | x | × | 13 | − | 1 | ÷ | x | × | 2 | x | = | 0 |
| 1 | + | 13 | ÷ | x | − | 2 | ÷ | x | × | x | = | 0 |
| 方程两边同时乘以: | x |
| 1 | x | + | 13 | − | 2 | ÷ | 1 | × | 1 | x | = | 0 |
| 1 | x | − | 2 | ÷ | 1 | × | 1 | x | = | 0 | − | 13 |
| 1 | x | − | 2 | x | = | 0 | − | 13 |
| - | x | = | 0 | − | 13 |
| - | x | = | 0 | − | 13 |
| - | x | = | - | 13 |
| 13 | = | x |
| x | = | 13 |