3 100 | = | ( | x | − | 31 5 | ) | ÷ | x | × | 100 100 |
方程两边同时乘以: | x |
3 100 | x | = | ( | x | − | 31 5 | ) | × | 100 100 |
3 100 | x | = | x | × | 100 100 | − | 31 5 | × | 100 100 |
3 100 | x | = | x | × | 100 100 | − | 31 5 |
3 100 | x | − | 100 100 | x | = | - | 31 5 |
- | 97 100 | x | = | - | 31 5 |
31 5 | = | 97 100 | x |
97 100 | x | = | 31 5 |
x | = | 31 5 | ÷ | 97 100 |
= | 31 5 | × | 100 97 |
= | 31 | × | 20 97 |
x | = | 620 97 |
x | = | 6.391753 |