( | 743 500 | − | 186 125 | ) | × | 300 | + | ( | y | − | 186 125 | ) | × | 400 | − | 1 10 | − | 1 10 | = | 1 |
方程左边 = | ( | 743 500 | − | 186 125 | ) | × | 300 | + | ( | y | − | 186 125 | ) | × | 400 | − | 1 5 |
( | 743 500 | − | 186 125 | ) | × | 300 | + | ( | y | − | 186 125 | ) | × | 400 | − | 1 5 | = | 1 |
方程左边 = | 743 500 | × | 300 | − | 186 125 | × | 300 | + | ( | y | − | 186 125 | ) | × | 400 | − | 1 5 |
= | 2229 5 | − | 2232 5 | + | ( | y | − | 186 125 | ) | × | 400 | − | 1 5 |
= | - | 4 5 | + | ( | y | − | 186 125 | ) | × | 400 |
= | - | 4 5 | + | y | × | 400 | − | 186 125 | × | 400 |
= | - | 4 5 | + | y | × | 400 | − | 2976 5 |
= | - | 596 | + | 400 | y |
- | 596 | + | 400 | y | = | 1 |
400 | y | = | 1 | + | 596 |
400 | y | = | 597 |
y | = | 597 | ÷ | 400 |
= | 597 | × | 1 400 |
y | = | 597 400 |
y | = | 1.4925 |