7 | y | − | 11689 25 | − | ( | 7 | y | × | 13 100 | − | 112 | − | 14 | ) | × | 10 100 | − | ( | 7 | y | − | 11689 25 | ) | × | 25 100 | = | 260 |
方程左边 = | 7 | y | − | 11689 25 | − | 7 | y | × | 13 100 | × | 10 100 | + | 112 | × | 10 100 | + | 14 | × | 10 100 | − | ( | 7 | y | − | 11689 25 | ) |
= | 7 | y | − | 11689 25 | − | 91 1000 | y | + | 56 5 | + | 7 5 | − | ( | 7 | y | − | 11689 25 | ) | × | 25 100 |
= | 6909 1000 | y | − | 11374 25 | − | ( | 7 | y | − | 11689 25 | ) | × | 25 100 |
= | 6909 1000 | y | − | 11374 25 | − | 7 | y | × | 25 100 | + | 11689 25 | × | 25 100 |
= | 6909 1000 | y | − | 11374 25 | − | 7 4 | y | + | 11689 100 |
= | 5159 1000 | y | − | 33807 100 |
5159 1000 | y | − | 33807 100 | = | 260 |
5159 1000 | y | = | 260 | + | 33807 100 |
5159 1000 | y | = | 59807 100 |
y | = | 59807 100 | ÷ | 5159 1000 |
= | 59807 100 | × | 1000 5159 |
= | 5437 | × | 10 469 |
y | = | 54370 469 |
y | = | 115.927505 |