( | 820 | × | 11 20 | + | x | ) | ÷ | ( | 820 | + | x | ) | = | 3 5 |
方程两边同时乘以: | ( | 820 | + | x | ) |
( | 820 | × | 11 20 | + | x | ) | = | 3 5 | ( | 820 | + | x | ) |
820 | × | 11 20 | + | x | = | 3 5 | ( | 820 | + | x | ) |
820 | × | 11 20 | + | x | = | 3 5 | × | 820 | + | 3 5 | x |
451 | + | x | = | 492 | + | 3 5 | x |
x | − | 3 5 | x | = | 492 | − | 451 |
2 5 | x | = | 492 | − | 451 |
2 5 | x | = | 41 |
x | = | 41 | ÷ | 2 5 |
= | 41 | × | 5 2 |
x | = | 205 2 |
x | = | 102.5 |