解方程:(7/10x-30):(3/10x+30)=3:2
问题描述:
解方程:(7/10x-30):(3/10x+30)=3:2
答
(7/10x-30):(3/10x+30)=3:2
(7/10x-30)*2=(3/10x+30)*3
7/5x-60=9/10x+90
7/5x-9/10x=90+60
1/2x=150
x=300