| 800 | ÷ | ( | a | − | 800 | ) | = | a | + | 600 | ÷ | ( | 2 | a | − | 600 | ) |
| Multiply both sides of the equation by: | ( | a | − | 800 | ) | , | ( | 2 | a | − | 600 | ) |
| 800 | ( | 2 | a | − | 600 | ) | = | a | ( | a | − | 800 | ) | ( | 2 | a | − | 600 | ) | + | 600 | ( | a | − | 800 | ) |
| 800 | × | 2 | a | − | 800 | × | 600 | = | a | ( | a | − | 800 | ) | ( | 2 | a | − | 600 | ) | + | 600 | ( | a | − | 800 | ) |
| 800 | × | 2 | a | − | 800 | × | 600 | = | a | a | ( | 2 | a | − | 600 | ) | − | a | × | 800 | ( | 2 | a | − | 600 | ) | + | 600 | ( | a | − | 800 | ) |
| 1600 | a | − | 480000 | = | a | a | ( | 2 | a | − | 600 | ) | − | a | × | 800 | ( | 2 | a | − | 600 | ) | + | 600 | ( | a | − | 800 | ) |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 800 | ( | 2 | a | − | 600 | ) | + | 600 | ( | a | − | 800 | ) |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 800 | × | 2 | a | + | a |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 1600 | a | + | a | × | 480000 |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 1600 | a | + | 480000 | a |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 1600 | a | + | 480000 | a |
| 1600 | a | − | 480000 | = | a | a | × | 2 | a | − | a | a | × | 600 | − | a | × | 1600 | a | + | 480600 | a |