| 200000 | p | − | 200000 | × | 4 | − | 400000 | = | 300000 |
| Left side of the equation = | 200000 | p | − | 800000 | − | 400000 |
| = | 200000 | p | − | 1200000 |
| 200000 | p | − | 1200000 | = | 300000 |
| 200000 | p | = | 300000 | + | 1200000 |
| 200000 | p | = | 1500000 |
| p | = | 1500000 | ÷ | 200000 |
| = | 1500000 | × | 1 200000 |
| = | 15 | × | 1 2 |
| p | = | 15 2 |
| p | = | 7.5 |