1200/x+(3000-1200)/(120%x)=27

问题描述:

1200/x+(3000-1200)/(120%x)=27

方程两边同时乘x得:
1200+1800/1.2=27x
27x=2700
x=100

.

1200/x+1800/1.2x=27
1200/x+1500/x=27
2700/x=27
x=2700÷27
x=100