| 270 | ( | 15 | + | x | ) | = | 600 | + | 24 | ( | x | − | 6 | ) |
| 方程左边 = | 270 | × | 15 | + | 270 | x |
| = | 4050 | + | 270 | x |
| 4050 | + | 270 | x | = | 600 | + | 24 | ( | x | − | 6 | ) |
| 方程右边 = | 600 | + | 24 | x | − | 24 | × | 6 |
| = | 600 | + | 24 | x | − | 144 |
| = | 456 | + | 24 | x |
| 4050 | + | 270 | x | = | 456 | + | 24 | x |
| 270 | x | − | 24 | x | = | 456 | − | 4050 |
| 246 | x | = | 456 | − | 4050 |
| 246 | x | = | - | 3594 |
| x | = | - | 3594 | ÷ | 246 |
| = | - | 3594 | × | 1 246 |
| = | - | 599 | × | 1 41 |
| x | = | - | 599 41 |
| x | = | - 14.609756 |