| 300000 | ÷ | ( | P | − | 600 | − | 15 | ) | = | 500 |
| Multiply both sides of the equation by: | ( | P | − | 600 | − | 15 | ) |
| 300000 | = | 500 | ( | P | − | 600 | − | 15 | ) |
| 300000 | = | 500 | P | − | 500 | × | 600 | − | 500 | × | 15 |
| 300000 | = | 500 | P | − | 300000 | − | 7500 |
| 300000 | = | 500 | P | − | 307500 |
| - | 500 | P | = | - | 307500 | − | 300000 |
| - | 500 | P | = | - | 607500 |
| 607500 | = | 500 | P |
| 500 | P | = | 607500 |
| P | = | 607500 | ÷ | 500 |
| = | 607500 | × | 1 500 |
| = | 1215 | × | 1 |
| P | = | 1215 |