(1/9*X+25)/[X-(1/9*X+25)]=1/3怎么解
问题描述:
(1/9*X+25)/[X-(1/9*X+25)]=1/3怎么解
答
交叉相乘:3(1/9x+25)=x-(1/9x+25)
1/3x+75=x-1/9x-25
5/9x=100
x=180