| 16 | + | ( | 6 | − | x | ) | ( | 6 | − | x | ) | = | x | x |
| Left side of the equation = | 16 | + | 6 | ( | 6 | − | x | ) | − | x | ( | 6 | − | x | ) |
| = | 16 | + | 6 | × | 6 | − | 6 | x | − | x | ( | 6 | − | x | ) |
| = | 16 | + | 36 | − | 6 | x | − | x | ( | 6 | − | x | ) |
| = | 52 | − | 6 | x | − | x | ( | 6 | − | x | ) |
| = | 52 | − | 6 | x | − | x | × | 6 | + | x | x |
| = | 52 | − | 12 | x | + | x | x |
| 52 | − | 12 | x | + | x | x | = | x | x |
| x= | 13 3 |