9Y + 4 = 2Y + 25
subtract 2Y from both sides
7Y + 4 = 25
subtract 4 from both sides
7Y = 21
divide both sides integers by 7
(7/7)Y = 21/7
Y = 3
-----------------check in original equation
9(3) + 4 = 2(3) + 25
27 + 4 = 6 + 25
31 = 31
---------------checks
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-3x + 2y = 9 2y = 3x + 9y = 1,5x + 4,5
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-2y+9+9y-x = 2x+7y+9
2y-5=11y+40 Subtract 2y from both sides -5=9y+40 Subtract 40 from both sides. -45=9y Divide by 9. -5=y
If that's -18y2, the answer is (3x - 2y)(x + 9y)