| ( | 1177 2 | − | y | ) | ÷ | y | = | 73 1000 |
| 方程两边同时乘以: | y |
| ( | 1177 2 | − | y | ) | = | 73 1000 | y |
1177 2 | − | y | = | 73 1000 | y |
| - | y | − | 73 1000 | y | = | - | 1177 2 |
| - | 1073 1000 | y | = | - | 1177 2 |
1177 2 | = | 1073 1000 | y |
1073 1000 | y | = | 1177 2 |
| y | = | 1177 2 | ÷ | 1073 1000 |
| = | 1177 2 | × | 1000 1073 |
| = | 1177 | × | 500 1073 |
| y | = | 588500 1073 |
| y | = | 548.462255 |