| 1500 | x | − | 270000 | = | ( | 1800 | x | − | 324000 | ) | − | 300 |
| 方程右边 = | 1800 | x | − | 324000 | − | 300 |
| = | 1800 | x | − | 324300 |
| 1500 | x | − | 270000 | = | 1800 | x | − | 324300 |
| 1500 | x | − | 1800 | x | = | - | 324300 | + | 270000 |
| - | 300 | x | = | - | 324300 | + | 270000 |
| - | 300 | x | = | - | 54300 |
| 54300 | = | 300 | x |
| 300 | x | = | 54300 |
| x | = | 54300 | ÷ | 300 |
| = | 54300 | × | 1 300 |
| = | 181 | × | 1 |
| x | = | 181 |