Solve simultaneously for x and y
4x+y=2 and 4x+y^2=8
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4x+y=2
y=2-4x
4x+y2=8
4x+4-16x+16x2+8=0
16x2-12x+12=0
4x2-3x+3=0
x=undefined
because the value of confirmation is negative
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