(6x+180)/(5x+30)=1.5

问题描述:

(6x+180)/(5x+30)=1.5

(6x+180)/(5x+30)=1.5
6x+180=1.5*(5x+30)
6x+180=1.5*5x+1.5*30
6x+180=7.5x+45
7.5x-6x=180-45
1.5x=135
x=135/1.5
x=90