| ( | 2 | − | 1 20 | ) | x | + | ( | - | 2 | − | 1 20 | ) | ( | 1 | − | x | ) | = | 0 |
| Left side of the equation = | 2 | x | − | 1 20 | x | + | ( | - | 2 | − | 1 20 | ) | ( | 1 | − | x | ) |
| = | 39 20 | x | + | ( | - | 2 | − | 1 20 | ) | ( | 1 | − | x | ) |
| = | 39 20 | x | − | 2 | ( | 1 | − | x | ) | − | 1 20 | ( | 1 | − | x | ) |
| = | 39 20 | x | − | 2 | × | 1 | + | 2 | x | − | 1 20 | ( | 1 | − | x | ) |
| = | 39 20 | x | − | 2 | + | 2 | x | − | 1 20 | ( | 1 | − | x | ) |
| = | 79 20 | x | − | 2 | − | 1 20 | ( | 1 | − | x | ) |
| = | 79 20 | x | − | 2 | − | 1 20 | × | 1 | + | 1 20 | x |
| = | 79 20 | x | − | 2 | − | 1 20 | + | 1 20 | x |
| = | 4 | x | − | 41 20 |
| 4 | x | − | 41 20 | = | 0 |
| 4 | x | = | 0 | + | 41 20 |
| 4 | x | = | 41 20 |
| x | = | 41 20 | ÷ | 4 |
| = | 41 20 | × | 1 4 |
| x | = | 41 80 |
| x | = | 0.5125 |