571 2 | x | + | 2220 | ( | 5 | − | x | ) | = | 3847 |
| 方程左边 = | 571 2 | x | + | 2220 | × | 5 | − | 2220 | x |
| = | 571 2 | x | + | 11100 | − | 2220 | x |
| = | - | 3869 2 | x | + | 11100 |
| - | 3869 2 | x | + | 11100 | = | 3847 |
| - | 3869 2 | x | = | 3847 | − | 11100 |
| - | 3869 2 | x | = | - | 7253 |
| 7253 | = | 3869 2 | x |
3869 2 | x | = | 7253 |
| x | = | 7253 | ÷ | 3869 2 |
| = | 7253 | × | 2 3869 |
| x | = | 14506 3869 |
| x | = | 3.749289 |