| 168 | = | 60 | × | 44 | ÷ | 12 | × | ( | 1 | − | x | ) |
| Right side of the equation = | 220 | ( | 1 | − | x | ) |
| 168 | = | 220 | ( | 1 | − | x | ) |
| Right side of the equation = | 220 | × | 1 | − | 220 | x |
| = | 220 | − | 220 | x |
| 168 | = | 220 | − | 220 | x |
| 220 | x | = | 220 | − | 168 |
| 220 | x | = | 52 |
| x | = | 52 | ÷ | 220 |
| = | 52 | × | 1 220 |
| = | 13 | × | 1 55 |
| x | = | 13 55 |
| x | = | 0.236364 |