| ( | ( | X | − | 0 | ) | ( | 1 | − | 25 100 | ) | − | 0 | ) | ÷ | ( | 100 | + | 50 | ) | = | 0 |
| Multiply both sides of the equation by: | ( | 100 | + | 50 | ) |
| ( | ( | X | − | 0 | ) | ( | 1 | − | 25 100 | ) | − | 0 | ) | = | 0 |
| ( | X | − | 0 | ) | ( | 1 | − | 25 100 | ) | − | 0 | = | 0 |
| X | ( | 1 | − | 25 100 | ) | − | 0 | ( | 1 | − | 25 100 | ) | − | 0 | = | 0 |
| X | × | 1 | − | X | × | 25 100 | = | 0 |
3 4 | X | = | 0 |
| X | = | 0 | ÷ | 3 4 |
| = | 0 | × | 4 3 |
| X | = | 0 |