| 6 | × | 6 | − | x | x | = | 8 | × | 8 | − | ( | 10 | − | x | ) | ( | 10 | − | x | ) |
| Left side of the equation = | 36 | − | x | x |
| 36 | − | x | x | = | 8 | × | 8 | − | ( | 10 | − | x | ) | ( | 10 | − | x | ) |
| Right side of the equation = | 64 | − | ( | 10 | − | x | ) | ( | 10 | − | x | ) |
| 36 | − | x | x | = | 64 | − | ( | 10 | − | x | ) | ( | 10 | − | x | ) |
| Right side of the equation = | 64 | − | 10 | ( | 10 | − | x | ) | + | x | ( | 10 | − | x | ) |
| = | 64 | − | 10 | × | 10 | + | 10 | x | + | x | ( | 10 | − | x | ) |
| = | 64 | − | 100 | + | 10 | x | + | x | ( | 10 | − | x | ) |
| = | - | 36 | + | 10 | x | + | x | ( | 10 | − | x | ) |
| = | - | 36 | + | 10 | x | + | x | × | 10 | − | x | x |
| = | - | 36 | + | 20 | x | − | x | x |
| 36 | − | x | x | = | - | 36 | + | 20 | x | − | x | x |
| x= | 18 5 |