( | 10 | − | 450 | l | ) | ÷ | ( | ( | 1 10 | − | l | ) | × | 1 10 | ) | = | 500 |
方程两边同时乘以: | ( | ( | 1 10 | − | l | ) | × | 1 10 | ) |
( | 10 | − | 450 | l | ) | = | 500 | ( | ( | 1 10 | − | l | ) | × | 1 10 | ) |
10 | − | 450 | l | = | 500 | ( | ( | 1 10 | − | l | ) | × | 1 10 | ) |
10 | − | 450 | l | = | 500 | ( | 1 10 | − | l | ) | × | 1 10 |
10 | − | 450 | l | = | 50 | ( | 1 10 | − | l | ) |
10 | − | 450 | l | = | 50 | × | 1 10 | − | 50 | l |
10 | − | 450 | l | = | 5 | − | 50 | l |
- | 450 | l | + | 50 | l | = | 5 | − | 10 |
- | 400 | l | = | 5 | − | 10 |
- | 400 | l | = | - | 5 |
5 | = | 400 | l |
400 | l | = | 5 |
l | = | 5 | ÷ | 400 |
= | 5 | × | 1 400 |
= | 1 | × | 1 80 |
l | = | 1 80 |
l | = | 0.0125 |