2002x+10y=1.(1)
10x+2002y=-1.(2)
(1)+(2)得
2012x+2012y=0
x=-y.(3)
将(3)代入(1)得
-2002y+10y=1
-1992y=1
y=-1/1992
x=-y=1/1992
解得
x=1/1992
y=-1/1992