x+3y,1-4x-3y,2x+y+7 please solve it
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x+3y,1-4x-3y,2x+y+7
=(x+3y)+(1-4x-3y)+(2x+y+7)
=x+3y+1-4x-3y+2x+y+7
=3x-4x+y+8
=y-x+8
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