| ( | 50000 | − | 32000 | − | x | ) | ÷ | ( | 32000 | + | x | ) | = | 20 100 |
| 方程两边同时乘以: | ( | 32000 | + | x | ) |
| ( | 50000 | − | 32000 | − | x | ) | = | 20 100 | ( | 32000 | + | x | ) |
| 50000 | − | 32000 | − | x | = | 20 100 | ( | 32000 | + | x | ) |
| 50000 | − | 32000 | − | x | = | 20 100 | × | 32000 | + | 20 100 | x |
| 50000 | − | 32000 | − | x | = | 6400 | + | 20 100 | x |
| 18000 | − | x | = | 6400 | + | 20 100 | x |
| - | x | − | 20 100 | x | = | 6400 | − | 18000 |
| - | 6 5 | x | = | 6400 | − | 18000 |
| - | 6 5 | x | = | - | 11600 |
| 11600 | = | 6 5 | x |
6 5 | x | = | 11600 |
| x | = | 11600 | ÷ | 6 5 |
| = | 11600 | × | 5 6 |
| = | 5800 | × | 5 3 |
| x | = | 29000 3 |
| x | = | 9666.666667 |