(2x-y-1)(x-1)=-2005=-2005*1=-401*5所以：1）2x-y-1=-2005,x-1=1x=2,y=20082)2x-y-1=2005,x-1=-1x=0,y=-20063)2x-y-1=-1,x-1=2005x=2006,y=40124)2x-y-1=1,x-1=-2005x=-2004,y=-40105)2x-y-1=-401,x-1=5x=6,y=4126)...