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x=3+2y
(3+2y)y+y^2=0
3y+2y^2+y^2=0
3y^2+3y=0
y(3y+3)=0
3y+3=0
3y=-3
y=-1
xy+y^2=0
x(-1)+(-1)^2=0
-x+1=0
x=1