| 300000 | ÷ | ( | 7 10 | x | × | 2 | ( | 150 | − | 2 | x | ) | ) | = | 160 |
| Multiply both sides of the equation by: | ( | 7 10 | x | × | 2 | ( | 150 | − | 2 | x | ) | ) |
| 300000 | = | 160 | ( | 7 10 | x | × | 2 | ( | 150 | − | 2 | x | ) | ) |
| 300000 | = | 160 | × | 7 10 | x | × | 2 | ( | 150 | − | 2 | x | ) |
| 300000 | = | 224 | x | ( | 150 | − | 2 | x | ) |
| 300000 | = | 224 | x | × | 150 | − | 224 | x | × | 2 | x |
| 300000 | = | 33600 | x | − | 448 | x | x |