| ( | x | − | 1 | ) | ( | 3 | x | − | 7 | ) | = | 7 | ÷ | 6 |
| Left side of the equation = | x | ( | 3 | x | − | 7 | ) | − | 1 | ( | 3 | x | − | 7 | ) |
| = | x | × | 3 | x | − | x | × | 7 | − | 1 | ( | 3 | x | − | 7 | ) |
| = | x | × | 3 | x | − | 7 | x | − | 1 | × | 3 | x | + | 1 | × | 7 |
| = | x | × | 3 | x | − | 7 | x | − | 3 | x | + | 7 |
| = | x | × | 3 | x | − | 10 | x | + | 7 |
| x | × | 3 | x | − | 10 | x | + | 7 | = | 7 | ÷ | 6 |
| Right side of the equation = | 7 6 |
| x | × | 3 | x | − | 10 | x | + | 7 | = | 7 6 |