3x-2y+9+9y-x = 2x+7y+9
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-3x + 2y = 9 2y = 3x + 9y = 1,5x + 4,5
If that's -18y2, the answer is (3x - 2y)(x + 9y)
2y-5=11y+40 Subtract 2y from both sides -5=9y+40 Subtract 40 from both sides. -45=9y Divide by 9. -5=y
x - 2y=0 so x = 2y 9y - 4x=1 Substituting for x, 9y-4*(2y) = 1 or 9y-8y = 1 so that y = 1 then x = 2y = 2*1 = 2
3x-9y-27