| 1 | ÷ | ( | 3 | x | ) | + | 1 | ÷ | ( | 1 | − | x | ) | = | 0 |
| 方程两边同时乘以: | ( | 3 | x | ) |
| 1 | + | 1 | ÷ | ( | 1 | − | x | ) | × | ( | 3 | x | ) | = | 0 |
| 1 | + | 1 | ÷ | ( | 1 | − | x | ) | × | 3 | x | = | 0 |
| 1 | + | 3 | ÷ | ( | 1 | − | x | ) | × | x | = | 0 |
| 方程两边同时乘以: | ( | 1 | − | x | ) |
| 1 | ( | 1 | − | x | ) | + | 3 | x | = | 0 |
| 1 | × | 1 | − | 1 | x | + | 3 | x | = | 0 |
| 1 | − | 1 | x | + | 3 | x | = | 0 |
| 1 | + | 2 | x | = | 0 |
| 2 | x | = | 0 | − | 1 |
| 2 | x | = | - | 1 |
| x | = | - | 1 | ÷ | 2 |
| = | - | 1 | × | 1 2 |
| x | = | - | 1 2 |
| x | = | - 0.5 |