(x-3):(3/7x+30)=3:2 求x
问题描述:
(x-3):(3/7x+30)=3:2 求x
答
(x-3):(3/7x+30)=3:2
2(x-3)=3(3/7x+30)
2x-6=9/7x+90
2x-9/7x=90+6
5/7x=96
x=96÷5/7
x=134.4