| 2880 | ( | 1 | − | x | ) | ( | 1 | − | x | ) | = | 2000 |
| Left side of the equation = | 2880 | × | 1 | ( | 1 | − | x | ) | − | 2880 | x | ( | 1 | − | x | ) |
| = | 2880 | ( | 1 | − | x | ) | − | 2880 | x | ( | 1 | − | x | ) |
| = | 2880 | × | 1 | − | 2880 | x | − | 2880 | x | ( | 1 | − | x | ) |
| = | 2880 | − | 2880 | x | − | 2880 | x | ( | 1 | − | x | ) |
| = | 2880 | − | 2880 | x | − | 2880 | x | × | 1 | + | 2880 | x | x |
| = | 2880 | − | 2880 | x | − | 2880 | x | + | 2880 | x | x |
| = | 2880 | − | 5760 | x | + | 2880 | x | x |
| 2880 | − | 5760 | x | + | 2880 | x | x | = | 2000 |
| x1= | 1 6 |
| x2= | 11 6 |