7 10 | = | ( | 33 100 | × | 1097 100 | + | n | × | 199 20 | ) | ÷ | ( | 33 100 | + | n | ) |
方程两边同时乘以: | ( | 33 100 | + | n | ) |
7 10 | ( | 33 100 | + | n | ) | = | ( | 33 100 | × | 1097 100 | + | n | × | 199 20 | ) |
7 10 | × | 33 100 | + | 7 10 | n | = | ( | 33 100 | × | 1097 100 | + | n | × | 199 20 | ) |
7 10 | × | 33 100 | + | 7 10 | n | = | 33 100 | × | 1097 100 | + | n | × | 199 20 |
231 1000 | + | 7 10 | n | = | 36201 10000 | + | n | × | 199 20 |
7 10 | n | − | 199 20 | n | = | 36201 10000 | − | 231 1000 |
- | 37 4 | n | = | 36201 10000 | − | 231 1000 |
- | 37 4 | n | = | 33891 10000 |
- | 33891 10000 | = | 37 4 | n |
37 4 | n | = | - | 33891 10000 |
n | = | - | 33891 10000 | ÷ | 37 4 |
= | - | 33891 10000 | × | 4 37 |
= | - | 33891 2500 | × | 1 37 |
n | = | - | 33891 92500 |
n | = | - 0.366389 |