| ( | 1039 250 | − | y | ) | × | 1587 500000 | ( | 1280000 | + | 100000 | y | ) | = | 0 |
| Left side of the equation = | 1039 250 | × | 1587 500000 | ( | 1280000 | + | 100000 | y | ) | − | y | × | 1587 500000 | ( | 1280000 | + | 100000 | y | ) |
| = | 1648893 125000000 | ( | 1280000 | + | 100000 | y | ) | − | y | × | 1587 500000 | ( | 1280000 | + | 100000 | y | ) |
| = | 1648893 125000000 | × | 1280000 | + | 1648893 125000000 | × | 100000 | y | − | y | × | 1587 500000 | ( | 1280000 | + | 100000 | y | ) |
| y1= | - | 64 5 |
| y2= | 1039 250 |