| ( | x | + | 7500 | ) | ( | 300 | ÷ | x | ) | = | 52 5 |
| x | ( | 300 | ÷ | x | ) | + | 7500 | ( | 300 | ÷ | x | ) | = | 52 5 |
| 1 | × | 300 | ÷ | 1 | + | 7500 | ( | 300 | ÷ | x | ) | = | 52 5 |
| 300 | + | 7500 | ( | 300 | ÷ | x | ) | = | 52 5 |
| 300 | + | 7500 | × | 300 | ÷ | x | = | 52 5 |
| 300 | + | 2250000 | ÷ | x | = | 52 5 |
| Multiply both sides of the equation by: | x |
| 300 | x | + | 2250000 | = | 52 5 | x |
| 300 | x | − | 52 5 | x | = | - | 2250000 |
1448 5 | x | = | - | 2250000 |
| x | = | - | 2250000 | ÷ | 1448 5 |
| = | - | 2250000 | × | 5 1448 |
| = | - | 281250 | × | 5 181 |
| x | = | - | 1406250 181 |
| x | = | - 7769.337017 |