| 1 | ÷ | x | − | 1 | ÷ | ( | 50 | + | x | ) | = | 1 | ÷ | 15 |
| 方程两边同时乘以: | x |
| 1 | − | 1 | ÷ | ( | 50 | + | x | ) | × | x | = | 1 | ÷ | 15 | × | x |
| 方程两边同时乘以: | ( | 50 | + | x | ) |
| 1 | ( | 50 | + | x | ) | − | 1 | x | = | 1 | ÷ | 15 | × | x | ( | 50 | + | x | ) |
| 1 | × | 50 | + | 1 | x | − | 1 | x | = | 1 | ÷ | 15 | × | x | ( | 50 | + | x | ) |
| 1 | × | 50 | + | 1 | x | − | 1 | x | = | 1 | ÷ | 15 | × | x | × | 50 | + | 1 | ÷ | 15 | × | x | x |
| 50 | + | 1 | x | − | 1 | x | = | 10 3 | x | + | 1 15 | x | x |
| 50 | + | 0 | x | = | 10 3 | x | + | 1 15 | x | x |