解方程组{(x-2y-1)(x-2y+1)=0 (3x-2y+1)(2x+y-3)=0
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解方程组{(x-2y-1)(x-2y+1)=0 (3x-2y+1)(2x+y-3)=0
解方程组{(x-2y-1)(x-2y+1)=0 (3x-2y+1)(2x+y-3)=0
解方程组{(x-2y-1)(x-2y+1)=0 (3x-2y+1)(2x+y-3)=0
(x-2y-1)(x-2y+1)=0 (3x-2y+1)(2x+y-3)=0
x= -1,y= -1
x= 7/5,y= 1/5
x= 0,y=1/2
x=1,y= 1
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