7 10 | = | ( | 511 500 | + | n | × | 199 200 | ) | ÷ | ( | 1 | + | n | ) |
方程两边同时乘以: | ( | 1 | + | n | ) |
7 10 | ( | 1 | + | n | ) | = | ( | 511 500 | + | n | × | 199 200 | ) |
7 10 | × | 1 | + | 7 10 | n | = | ( | 511 500 | + | n | × | 199 200 | ) |
7 10 | × | 1 | + | 7 10 | n | = | 511 500 | + | n | × | 199 200 |
7 10 | + | 7 10 | n | = | 511 500 | + | n | × | 199 200 |
7 10 | n | − | 199 200 | n | = | 511 500 | − | 7 10 |
- | 59 200 | n | = | 511 500 | − | 7 10 |
- | 59 200 | n | = | 161 500 |
- | 161 500 | = | 59 200 | n |
59 200 | n | = | - | 161 500 |
n | = | - | 161 500 | ÷ | 59 200 |
= | - | 161 500 | × | 200 59 |
= | - | 161 5 | × | 2 59 |
n | = | - | 322 295 |
n | = | - 1.091525 |