(4x/5)/(60-x+x/5)=3/2怎么算
问题描述:
(4x/5)/(60-x+x/5)=3/2怎么算
答
(4x/5)/(60-x+x/5)=3/2
(4x/5)/(60-4x/5)=3/2
4x/(300-4x)=3/2
2×4x=3×(300-4x)
8x=900-12x
8x+12x=900
20x=900
x=45