( | 1039 250 | − | y | ) | × | 1587 5000000 | ( | 1280000 | + | 80000 | y | ) | = | 0 |
方程左边 = | 1039 250 | × | 1587 5000000 | ( | 1280000 | + | 80000 | y | ) | − | y | × | 1587 5000000 | ( | 1280000 | + | 80000 | y | ) |
= | 1648893 1250000000 | ( | 1280000 | + | 80000 | y | ) | − | y | × | 1587 5000000 | ( | 1280000 | + | 80000 | y | ) |
= | 1648893 1250000000 | × | 1280000 | + | 1648893 1250000000 | × | 80000 | y | − | y | × | 1587 5000000 | ( | 1280000 | + | 80000 | y | ) |
y2= | 1039 250 |