( | 3 | + | x | ) | ÷ | ( | 4 | + | x | ) | = | 389 500 |
方程两边同时乘以: | ( | 4 | + | x | ) |
( | 3 | + | x | ) | = | 389 500 | ( | 4 | + | x | ) |
3 | + | x | = | 389 500 | ( | 4 | + | x | ) |
3 | + | x | = | 389 500 | × | 4 | + | 389 500 | x |
3 | + | x | = | 389 125 | + | 389 500 | x |
x | − | 389 500 | x | = | 389 125 | − | 3 |
111 500 | x | = | 389 125 | − | 3 |
111 500 | x | = | 14 125 |
x | = | 14 125 | ÷ | 111 500 |
= | 14 125 | × | 500 111 |
= | 14 | × | 4 111 |
x | = | 56 111 |
x | = | 0.504505 |
4 | + | x | = | 8 |
x | = | 8 | − | 4 |
x | = | 4 |