若分式3x+5/x-3无意义
则：x-3=0
x=3
5/3m-2x-1/2m-x=0
5/(3m-6)=1/(2m-3)
3m-6=10m-15
7m=9
m=9/7那个……不是x-3是x-1——抱歉若分式3x+5/x-1无意义则：x-1=0x=15/3m-2x-1/2m-x=05/(3m-2)=1/(2m-1)3m-2=10m-57m=3m=3/7