641 50000 | ( | x | ÷ | 781 10 | ) | + | 641 50000 | ( | 1 | − | x | ) | ÷ | 921 10 | = | x | ÷ | 781 10 |
| Left side of the equation = | 641 50000 | ( | x | ÷ | 781 10 | ) | + | 641 4605000 | ( | 1 | − | x | ) |
641 50000 | ( | x | ÷ | 781 10 | ) | + | 641 4605000 | ( | 1 | − | x | ) | = | x | ÷ | 781 10 |
| Left side of the equation = | 641 50000 | x | ÷ | 781 10 | + | 641 4605000 | ( | 1 | − | x | ) |
| = | 641 3905000 | x | + | 641 4605000 | ( | 1 | − | x | ) |
| = | 641 3905000 | x | + | 641 4605000 | × | 1 | − | 641 4605000 | x |
| = | 641 3905000 | x | + | 641 4605000 | − | 641 4605000 | x |