| 4000 | ÷ | ( | x | − | 4000 | ) | = | ( | 2 | x | − | 3000 | ) | ÷ | ( | x | + | 3000 | ) |
| Multiply both sides of the equation by: | ( | x | − | 4000 | ) | , | ( | x | + | 3000 | ) |
| 4000 | ( | x | + | 3000 | ) | = | ( | 2 | x | − | 3000 | ) | ( | x | − | 4000 | ) |
| 4000 | x | + | 4000 | × | 3000 | = | ( | 2 | x | − | 3000 | ) | ( | x | − | 4000 | ) |
| 4000 | x | + | 4000 | × | 3000 | = | 2 | x | ( | x | − | 4000 | ) | − | 3000 | ( | x | − | 4000 | ) |
| 4000 | x | + | 12000000 | = | 2 | x | ( | x | − | 4000 | ) | − | 3000 | ( | x | − | 4000 | ) |
| 4000 | x | + | 12000000 | = | 2 | x | x | − | 2 | x | × | 4000 | − | 3000 | ( | x | − | 4000 | ) |
| 4000 | x | + | 12000000 | = | 2 | x | x | − | 8000 | x | − | 3000 | ( | x | − | 4000 | ) |
| 4000 | x | + | 12000000 | = | 2 | x | x | − | 8000 | x | − | 3000 | x | + | 3000 | × | 4000 |
| 4000 | x | + | 12000000 | = | 2 | x | x | − | 8000 | x | − | 3000 | x | + | 12000000 |
| 4000 | x | + | 12000000 | = | 2 | x | x | − | 11000 | x | + | 12000000 |