| 10000 | ÷ | ( | 1 | + | Y | ) | − | 13 50 | × | 100000 | ÷ | ( | 1 | + | Y | ) | = | 37 50 | × | 100000 |
| 方程两边同时乘以: | ( | 1 | + | Y | ) |
| 10000 | − | 13 50 | × | 100000 | = | 37 50 | × | 100000 | ( | 1 | + | Y | ) |
| 10000 | − | 13 50 | × | 100000 | = | 37 50 | × | 100000 | × | 1 | + | 37 50 | × | 100000 | Y |
| 10000 | − | 26000 | = | 74000 | + | 74000 | Y |
| - | 16000 | = | 74000 | + | 74000 | Y |
| - | 74000 | Y | = | 74000 | + | 16000 |
| - | 74000 | Y | = | 90000 |
| - | 90000 | = | 74000 | Y |
| 74000 | Y | = | - | 90000 |
| Y | = | - | 90000 | ÷ | 74000 |
| = | - | 90000 | × | 1 74000 |
| = | - | 45 | × | 1 37 |
| Y | = | - | 45 37 |
| Y | = | - 1.216216 |