2x^2-xy-3x+y+2006=0
x= 2,y= 2008
x=6,y= 412
x = 402,y= 808
x = 2006,y =4012求过程不定方程! x=1, 无解，

x= 2, y= 2008
x=6, y= 412
x = 402,y= 808
x = 2006, y =4012