| ( | 200 | × | 10000 | + | 850000 | ) | × | 25 100 | = | 10000 | p | − | 10000 | p | − | ( | 200 | × | 10000 | + | 850000 | ) |
| Left side of the equation = | 200 | × | 10000 | × | 25 100 | + | 850000 | × | 25 100 |
| = | 500000 | + | 212500 |
| = | 712500 |
| 712500 | = | 10000 | p | − | 10000 | p | − | ( | 200 | × | 10000 | + | 850000 | ) |
| Right side of the equation = | 0 | p | − | ( | 200 | × | 10000 | + | 850000 | ) |
| 712500 | = | 0 | p | − | ( | 200 | × | 10000 | + | 850000 | ) |
| Right side of the equation = | 0 | p | − | 200 | × | 10000 | − | 850000 |
| = | 0 | p | − | 2000000 | − | 850000 |
| = | 0 | p | − | 2850000 |
| 712500 | = | - | 2850000 |
| = | - | 2850000 | − | 712500 |