3 25 | X | = | 0 |
| X | = | 0 | ÷ | 3 25 |
| = | 0 | × | 25 3 |
| X | = | 0 |
| ( | 2 5 | x | ) | × | 23 25 | + | 4000 | = | x | × | 11 20 |
| 方程左边 = | 2 5 | x | × | 23 25 | + | 4000 |
| = | 46 125 | x | + | 4000 |
46 125 | x | + | 4000 | = | x | × | 11 20 |
46 125 | x | − | 11 20 | x | = | - | 4000 |
| - | 91 500 | x | = | - | 4000 |
| 4000 | = | 91 500 | x |
91 500 | x | = | 4000 |
| x | = | 4000 | ÷ | 91 500 |
| = | 4000 | × | 500 91 |
| x | = | 2000000 91 |
| x | = | 21978.021978 |