| ( | x | + | 600 | × | 60 100 | ) | ÷ | x | + | 600 | = | 75 100 |
| 方程两边同时乘以: | x |
| ( | x | + | 600 | × | 60 100 | ) | + | 600 | x | = | 75 100 | x |
| x | + | 600 | × | 60 100 | + | 600 | x | = | 75 100 | x |
| x | + | 360 | + | 600 | x | = | 75 100 | x |
| 601 | x | + | 360 | = | 75 100 | x |
| 601 | x | − | 75 100 | x | = | - | 360 |
2401 4 | x | = | - | 360 |
| x | = | - | 360 | ÷ | 2401 4 |
| = | - | 360 | × | 4 2401 |
| x | = | - | 1440 2401 |
| x | = | - 0.59975 |