36 100 | = | ( | 2 | × | 30 100 | + | 40 100 | x | ) | ÷ | ( | 2 | + | x | ) |
方程两边同时乘以: | ( | 2 | + | x | ) |
36 100 | ( | 2 | + | x | ) | = | ( | 2 | × | 30 100 | + | 40 100 | x | ) |
36 100 | × | 2 | + | 36 100 | x | = | ( | 2 | × | 30 100 | + | 40 100 | x | ) |
36 100 | × | 2 | + | 36 100 | x | = | 2 | × | 30 100 | + | 40 100 | x |
18 25 | + | 36 100 | x | = | 3 5 | + | 40 100 | x |
36 100 | x | − | 40 100 | x | = | 3 5 | − | 18 25 |
- | 1 25 | x | = | 3 5 | − | 18 25 |
- | 1 25 | x | = | - | 3 25 |
3 25 | = | 1 25 | x |
1 25 | x | = | 3 25 |
x | = | 3 25 | ÷ | 1 25 |
= | 3 25 | × | 25 |
= | 3 | × | 1 |
x | = | 3 |