| 10000 | P | × | 1 4 | = | 10000 | P | − | 10000 | P | × | 1 4 | − | ( | 200 | × | 10000 | − | 850000 | ) |
| Left side of the equation = | 2500 | P |
| 2500 | P | = | 10000 | P | − | 10000 | P | × | 1 4 | − | ( | 200 | × | 10000 | − | 850000 | ) |
| Right side of the equation = | 10000 | P | − | 2500 | P | − | ( | 200 | × | 10000 | − | 850000 | ) |
| = | 7500 | P | − | ( | 200 | × | 10000 | − | 850000 | ) |
| 2500 | P | = | 7500 | P | − | ( | 200 | × | 10000 | − | 850000 | ) |
| Right side of the equation = | 7500 | P | − | 200 | × | 10000 | + | 850000 |
| = | 7500 | P | − | 2000000 | + | 850000 |
| = | 7500 | P | − | 1150000 |
| 2500 | P | = | 7500 | P | − | 1150000 |
| 2500 | P | − | 7500 | P | = | - | 1150000 |
| - | 5000 | P | = | - | 1150000 |
| 1150000 | = | 5000 | P |
| 5000 | P | = | 1150000 |
| P | = | 1150000 | ÷ | 5000 |
| = | 1150000 | × | 1 5000 |
| = | 230 | × | 1 |
| P | = | 230 |