| ( | 2832 5 | − | y | ) | ÷ | y | = | 7 100 |
| 方程两边同时乘以: | y |
| ( | 2832 5 | − | y | ) | = | 7 100 | y |
2832 5 | − | y | = | 7 100 | y |
| - | y | − | 7 100 | y | = | - | 2832 5 |
| - | 107 100 | y | = | - | 2832 5 |
2832 5 | = | 107 100 | y |
107 100 | y | = | 2832 5 |
| y | = | 2832 5 | ÷ | 107 100 |
| = | 2832 5 | × | 100 107 |
| = | 2832 | × | 20 107 |
| y | = | 56640 107 |
| y | = | 529.345794 |