| 2 | × | 1200 | x | = | 2400 | ( | 22 | − | x | ) |
| Left side of the equation = | 2400 | x |
| 2400 | x | = | 2400 | ( | 22 | − | x | ) |
| Right side of the equation = | 2400 | × | 22 | − | 2400 | x |
| = | 52800 | − | 2400 | x |
| 2400 | x | = | 52800 | − | 2400 | x |
| 2400 | x | + | 2400 | x | = | 52800 |
| 4800 | x | = | 52800 |
| x | = | 52800 | ÷ | 4800 |
| = | 52800 | × | 1 4800 |
| = | 11 | × | 1 |
| x | = | 11 |