| ( | 27593 5 | − | y | ) | ÷ | y | = | 12 500 |
| 方程两边同时乘以: | y |
| ( | 27593 5 | − | y | ) | = | 12 500 | y |
27593 5 | − | y | = | 12 500 | y |
| - | y | − | 12 500 | y | = | - | 27593 5 |
| - | 128 125 | y | = | - | 27593 5 |
27593 5 | = | 128 125 | y |
128 125 | y | = | 27593 5 |
| y | = | 27593 5 | ÷ | 128 125 |
| = | 27593 5 | × | 125 128 |
| = | 27593 | × | 25 128 |
| y | = | 689825 128 |
| y | = | 5389.257812 |