| ( | 577 5 | − | x | ) | ÷ | x | = | 487 1000 |
| 方程两边同时乘以: | x |
| ( | 577 5 | − | x | ) | = | 487 1000 | x |
577 5 | − | x | = | 487 1000 | x |
| - | x | − | 487 1000 | x | = | - | 577 5 |
| - | 1487 1000 | x | = | - | 577 5 |
577 5 | = | 1487 1000 | x |
1487 1000 | x | = | 577 5 |
| x | = | 577 5 | ÷ | 1487 1000 |
| = | 577 5 | × | 1000 1487 |
| = | 577 | × | 200 1487 |
| x | = | 115400 1487 |
| x | = | 77.605918 |