x-[1/4x+(25%x-5)]=65 怎么解
问题描述:
x-[1/4x+(25%x-5)]=65 怎么解
x-[1/4x+(25%x-5)]=65
答
x-[1/4x+(25%x-5)]=65
x-(1/4x+1/4x-5)=65
x-(1/2x-5)=65
1/2x+5=65
1/2x=60
x=120