7 10 | = | ( | 1 | × | 1097 100 | + | n | × | 199 20 | ) | ÷ | ( | 1 | + | n | ) |
方程两边同时乘以: | ( | 1 | + | n | ) |
7 10 | ( | 1 | + | n | ) | = | ( | 1 | × | 1097 100 | + | n | × | 199 20 | ) |
7 10 | × | 1 | + | 7 10 | n | = | ( | 1 | × | 1097 100 | + | n | × | 199 20 | ) |
7 10 | × | 1 | + | 7 10 | n | = | 1 | × | 1097 100 | + | n | × | 199 20 |
7 10 | + | 7 10 | n | = | 1097 100 | + | n | × | 199 20 |
7 10 | n | − | 199 20 | n | = | 1097 100 | − | 7 10 |
- | 37 4 | n | = | 1097 100 | − | 7 10 |
- | 37 4 | n | = | 1027 100 |
- | 1027 100 | = | 37 4 | n |
37 4 | n | = | - | 1027 100 |
n | = | - | 1027 100 | ÷ | 37 4 |
= | - | 1027 100 | × | 4 37 |
= | - | 1027 25 | × | 1 37 |
n | = | - | 1027 925 |
n | = | - 1.11027 |