203 2 | × | 1649 20 | + | 90 | n | = | 203 2 | × | 85 | + | n | × | 85 |
方程左边 = | 334747 40 | + | 90 | n |
334747 40 | + | 90 | n | = | 203 2 | × | 85 | + | n | × | 85 |
方程右边 = | 17255 2 | + | n | × | 85 |
334747 40 | + | 90 | n | = | 17255 2 | + | 85 | n |
90 | n | − | 85 | n | = | 17255 2 | − | 334747 40 |
5 | n | = | 17255 2 | − | 334747 40 |
5 | n | = | 10353 40 |
n | = | 10353 40 | ÷ | 5 |
= | 10353 40 | × | 1 5 |
n | = | 10353 200 |
n | = | 51.765 |