| 2 | ( | b | − | 3 | ) | − | 6 | = | 3 | ( | 1 | − | b | ) |
| Left side of the equation = | 2 | b | − | 2 | × | 3 | − | 6 |
| = | 2 | b | − | 6 | − | 6 |
| = | 2 | b | − | 12 |
| 2 | b | − | 12 | = | 3 | ( | 1 | − | b | ) |
| Right side of the equation = | 3 | × | 1 | − | 3 | b |
| = | 3 | − | 3 | b |
| 2 | b | − | 12 | = | 3 | − | 3 | b |
| 2 | b | + | 3 | b | = | 3 | + | 12 |
| 5 | b | = | 3 | + | 12 |
| 5 | b | = | 15 |
| b | = | 15 | ÷ | 5 |
| = | 15 | × | 1 5 |
| = | 3 | × | 1 |
| b | = | 3 |