| ( | 70 | − | 1 | ÷ | 50 | × | x | ) | ( | x | − | 100 | ) | = | 0 |
| Left side of the equation = | 70 | ( | x | − | 100 | ) | − | 1 | ÷ | 50 | × | x | ( | x | − | 100 | ) |
| = | 70 | ( | x | − | 100 | ) | − | 1 50 | x | ( | x | − | 100 | ) |
| = | 70 | x | − | 70 | × | 100 | − | 1 50 | x | ( | x | − | 100 | ) |
| = | 70 | x | − | 7000 | − | 1 50 | x | ( | x | − | 100 | ) |
| = | 70 | x | − | 7000 | − | 1 50 | x | x | + | 1 50 | x | × | 100 |
| = | 70 | x | − | 7000 | − | 1 50 | x | x | + | 2 | x |
| = | 72 | x | − | 7000 | − | 1 50 | x | x |
| 72 | x | − | 7000 | − | 1 50 | x | x | = | 0 |