| 50 | ( | 1 | − | x | ) | × | 2 | = | 0 |
| Left side of the equation = | 100 | ( | 1 | − | x | ) |
| 100 | ( | 1 | − | x | ) | = | 0 |
| Left side of the equation = | 100 | × | 1 | − | 100 | x |
| = | 100 | − | 100 | x |
| 100 | − | 100 | x | = | 0 |
| - | 100 | x | = | 0 | − | 100 |
| - | 100 | x | = | - | 100 |
| 100 | = | 100 | x |
| 100 | x | = | 100 |
| x | = | 100 | ÷ | 100 |
| = | 100 | × | 1 100 |
| = | 1 | × | 1 |
| x | = | 1 |