| ( | x | − | 4000000 | × | 5 100 | − | 6000000 | × | 6 100 | ) | ( | 1 | − | 25 100 | ) | ÷ | 8000000 | = | ( | x | − | 4000000 | × | 5 100 | ) | ( | 1 | − | 25 100 | ) | ÷ | 8200000 |
| Left side of the equation = | x | ( | 1 | − | 25 100 | ) | × | 1 8000000 | − | 4000000 | × | 5 100 | ( | 1 | − | 25 100 | ) | × | 1 8000000 | − | 6000000 | × | 6 100 | ( | 1 | − | 25 100 | ) | × | 1 8000000 |
| = | x | ( | 1 | − | 25 100 | ) | × | 1 8000000 | − | 1 40 | ( | 1 | − | 25 100 | ) | − | 9 200 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 | × | 1 8000000 | − | x | × | 25 100 | × | 1 8000000 | − | 1 40 | ( | 1 | − | 25 100 | ) | − | 9 200 | ( | 1 | − | 25 100 | ) |
| = | x | × | 1 8000000 | − | x | × | 1 32000000 | − | 1 40 | ( | 1 | − | 25 100 | ) | − | 9 200 | ( | 1 | − | 25 100 | ) |