| 5 | ( | x | − | 30 | ) | = | ( | 150 | − | x | ) | ÷ | 83 250 |
| 方程左边 = | 5 | x | − | 5 | × | 30 |
| = | 5 | x | − | 150 |
| 5 | x | − | 150 | = | ( | 150 | − | x | ) | ÷ | 83 250 |
| 方程右边 = | 150 | × | 250 83 | − | x | × | 250 83 |
| = | 37500 83 | − | x | × | 250 83 |
| 5 | x | − | 150 | = | 37500 83 | − | 250 83 | x |
| 5 | x | + | 250 83 | x | = | 37500 83 | + | 150 |
665 83 | x | = | 37500 83 | + | 150 |
665 83 | x | = | 49950 83 |
| x | = | 49950 83 | ÷ | 665 83 |
| = | 49950 83 | × | 83 665 |
| = | 9990 | × | 1 133 |
| x | = | 9990 133 |
| x | = | 75.112782 |