| ( | 10 | − | 2 | X | ) | ( | 6 | − | 2 | X | ) | = | 12 |
| Left side of the equation = | 10 | ( | 6 | − | 2 | X | ) | − | 2 | X | ( | 6 | − | 2 | X | ) |
| = | 10 | × | 6 | − | 10 | × | 2 | X | − | 2 | X | ( | 6 | − | 2 | X | ) |
| = | 60 | − | 20 | X | − | 2 | X | ( | 6 | − | 2 | X | ) |
| = | 60 | − | 20 | X | − | 2 | X | × | 6 | + | 2 | X | × | 2 | X |
| = | 60 | − | 20 | X | − | 12 | X | + | 4 | X | X |
| = | 60 | − | 32 | X | + | 4 | X | X |
| 60 | − | 32 | X | + | 4 | X | X | = | 12 |