| 168 | x | = | 2880 | ÷ | 20 | × | ( | 52 | − | x | ) |
| Right side of the equation = | 144 | ( | 52 | − | x | ) |
| 168 | x | = | 144 | ( | 52 | − | x | ) |
| Right side of the equation = | 144 | × | 52 | − | 144 | x |
| = | 7488 | − | 144 | x |
| 168 | x | = | 7488 | − | 144 | x |
| 168 | x | + | 144 | x | = | 7488 |
| 312 | x | = | 7488 |
| x | = | 7488 | ÷ | 312 |
| = | 7488 | × | 1 312 |
| = | 24 | × | 1 |
| x | = | 24 |