| x | − | 1 | ÷ | 2 | × | x | − | 6 | − | ( | x | − | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 | ÷ | 2 | + | 3 | ) | = | 15 |
| Left side of the equation = | x | − | 1 2 | x | − | 6 | − | ( | x | − | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 | ÷ | 2 | + | 3 | ) |
| = | 1 2 | x | − | 6 | − | ( | x | − | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 | ÷ | 2 | + | 3 | ) |
1 2 | x | − | 6 | − | ( | x | − | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 | ÷ | 2 | + | 3 | ) | = | 15 |
| Left side of the equation = | 1 2 | x | − | 6 | − | x | + | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 | ÷ | 2 | − | 3 |
| = | 1 2 | x | − | 6 | − | x | + | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 2 | − | 3 |
| = | - | 1 2 | x | − | 9 | + | ( | 1 | ÷ | 2 | × | x | − | 6 | ) | × | 1 2 |
| = | - | 1 2 | x | − | 9 | + | 1 | ÷ | 2 | × | x | × | 1 2 | − | 6 | × | 1 2 |
| = | - | 1 2 | x | − | 9 | + | 1 4 | x | − | 3 |
| = | - | 1 4 | x | − | 12 |
| - | 1 4 | x | − | 12 | = | 15 |
| - | 1 4 | x | = | 15 | + | 12 |
| - | 1 4 | x | = | 27 |
| - | 27 | = | 1 4 | x |
1 4 | x | = | - | 27 |
| x | = | - | 27 | ÷ | 1 4 |
| = | - | 27 | × | 4 |
| x | = | - | 108 |