| 960 | x | = | 1350 | ( | x | − | 3 | ) | − | 3750 |
| Right side of the equation = | 1350 | x | − | 1350 | × | 3 | − | 3750 |
| = | 1350 | x | − | 4050 | − | 3750 |
| = | 1350 | x | − | 7800 |
| 960 | x | = | 1350 | x | − | 7800 |
| 960 | x | − | 1350 | x | = | - | 7800 |
| - | 390 | x | = | - | 7800 |
| 7800 | = | 390 | x |
| 390 | x | = | 7800 |
| x | = | 7800 | ÷ | 390 |
| = | 7800 | × | 1 390 |
| = | 20 | × | 1 |
| x | = | 20 |