| ( | 10 | X | + | ( | X | − | 6 | ) | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) | = | 0 |
| Left side of the equation = | 10 | X | ( | 10 | ( | X | − | 6 | ) | + | X | ) | + | ( | X | − | 6 | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 10 | X | × | 10 | ( | X | − | 6 | ) | + | 10 | X | X | + | ( | X | − | 6 | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 100 | X | ( | X | − | 6 | ) | + | 10 | X | X | + | ( | X | − | 6 | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 100 | X | X | − | 100 | X | × | 6 | + | 10 | X | X | + | ( | X | − | 6 | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 100 | X | X | − | 600 | X | + | 10 | X | X | + | ( | X | − | 6 | ) | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 100 | X | X | − | 600 | X | + | 10 | X | X | + | X | ( | 10 | ( | X | − | 6 | ) | + | X | ) | − | 6 | ( | 10 | ( | X | − | 6 | ) | + | X | ) |
| = | 100 | X | X | − | 600 | X | + | 10 | X | X | + | X | × | 10 | ( | X | − | 6 | ) | + | X |
| = | 100 | X | X | − | 600 | X | + | 10 | X | X | + | X | × | 10 | X | − | X |
| = | 100 | X | X | − | 600 | X | + | 10 | X | X | + | X | × | 10 | X | − | X |
| = | 100 | X | X | − | 660 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 660 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 660 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 666 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 666 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 666 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| = | 100 | X | X | − | 726 | X | + | 10 | X | X | + | X | × | 10 | X | + | X |
| 100 | X | X | − | 726 | X | + | 10 | X | X | + | X | × | 10 | X | + | X | = | 0 |
| X1= | 6 11 |
| X2= | 60 11 |