若3x减2y等于0则(x加y)比(x减y)等于
问题描述：
若3x减2y等于0则(x加y)比(x减y)等于
答
若3x-2y=0,则3x=2y 即6x=4y
(x+y):(x-y)=[6(x+y)]:[6(x-y)]
=(6x+6y):(6x-6y)
=(4y+6y):(4y-6y)
=10y:(-2)y
=-5