| ( | 200 | − | x | ) | ÷ | ( | - | 50 | − | x | ) | = | - | 25 8 |
| 方程两边同时乘以: | ( | - | 50 | − | x | ) |
| ( | 200 | − | x | ) | = | - | 25 8 | ( | - | 50 | − | x | ) |
| 200 | − | x | = | - | 25 8 | ( | - | 50 | − | x | ) |
| 200 | − | x | = | 25 8 | × | 50 | + | 25 8 | x |
| 200 | − | x | = | 625 4 | + | 25 8 | x |
| - | x | − | 25 8 | x | = | 625 4 | − | 200 |
| - | 33 8 | x | = | 625 4 | − | 200 |
| - | 33 8 | x | = | - | 175 4 |
175 4 | = | 33 8 | x |
33 8 | x | = | 175 4 |
| x | = | 175 4 | ÷ | 33 8 |
| = | 175 4 | × | 8 33 |
| = | 175 | × | 2 33 |
| x | = | 350 33 |
| x | = | 10.606061 |