| 400 | ÷ | ( | x | − | 50 | ) | − | 360 | ÷ | x | = | 6 |
| 方程两边同时乘以: | ( | x | − | 50 | ) |
| 400 | − | 360 | ÷ | x | × | ( | x | − | 50 | ) | = | 6 | ( | x | − | 50 | ) |
| 400 | − | 360 | ÷ | x | × | x | + | 360 | ÷ | x | × | 50 | = | 6 | ( | x | − | 50 | ) |
| 400 | − | 360 | ÷ | x | × | x | + | 360 | ÷ | x | × | 50 | = | 6 | x | − | 6 | × | 50 |
| 400 | − | 360 | ÷ | x | × | x | + | 18000 | ÷ | x | = | 6 | x | − | 300 |
| 方程两边同时乘以: | x |
| 400 | x | − | 360 | ÷ | 1 | × | 1 | x | + | 18000 | = | 6 | x | x | − | 300 | x |
| x1= | - | 100 3 |
| x2=90 |