(3x+13)/(5x-13)=5:3怎么算
问题描述:
(3x+13)/(5x-13)=5:3怎么算
一楼的看不懂
答
3(3x+13)=5(5x-13)
9x+39=25x-65
16x=104
x=104/16=13/2