| 660 | − | ( | x | − | 3 | ) | ÷ | 12 5 | = | x |
| Left side of the equation = | 660 | − | x | × | 5 12 | + | 3 | × | 5 12 |
| = | 660 | − | x | × | 5 12 | + | 5 4 |
| = | 2645 4 | − | 5 12 | x |
2645 4 | − | 5 12 | x | = | x |
| - | 5 12 | x | − | x | = | - | 2645 4 |
| - | 17 12 | x | = | - | 2645 4 |
2645 4 | = | 17 12 | x |
17 12 | x | = | 2645 4 |
| x | = | 2645 4 | ÷ | 17 12 |
| = | 2645 4 | × | 12 17 |
| = | 2645 | × | 3 17 |
| x | = | 7935 17 |
| x | = | 466.764706 |