计算3y/xy-2x+6/2x-xy 很急很急!求帮助!
问题描述:
计算3y/xy-2x+6/2x-xy 很急很急!求帮助!
答
3y/xy-2x+6/2x-xy
=3y/xy-2x-6/xy-2x
=(3y-6)/(xy-2x)
=3(y-2)/x(y-2)
=3/x