213007079 1000 | + | ( | y | − | y | × | 17 20 | ) | ÷ | 21 20 | × | 1 20 | = | y |
方程左边 = | 213007079 1000 | + | ( | y | − | y | × | 17 20 | ) | × | 1 21 |
213007079 1000 | + | ( | y | − | y | × | 17 20 | ) | × | 1 21 | = | y |
方程左边 = | 213007079 1000 | + | y | × | 1 21 | − | y | × | 17 20 | × | 1 21 |
= | 213007079 1000 | + | y | × | 1 21 | − | y | × | 17 420 |
= | 213007079 1000 | + | 1 140 | y |
213007079 1000 | + | 1 140 | y | = | y |
1 140 | y | − | y | = | - | 213007079 1000 |
- | 139 140 | y | = | - | 213007079 1000 |
213007079 1000 | = | 139 140 | y |
139 140 | y | = | 213007079 1000 |
y | = | 213007079 1000 | ÷ | 139 140 |
= | 213007079 1000 | × | 140 139 |
= | 213007079 50 | × | 7 139 |
y | = | 1491049553 6950 |
y | = | 214539.504029 |