(5x-10)/(3x+10)=5/4怎么解
问题描述:
(5x-10)/(3x+10)=5/4怎么解
答
(5x-10)/(3x+10)=5/4
4(5x-10)=5(3x+10)
20x-40=15x+50
5x=90
x=18