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x + 9 = n
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9*(x+ 2)
x+x^2=72x^2 +x -72=0 (x+9)(x-8)=0 x=-9 or x=8
(x + 3)2 = (x + 2)2 + 9 x2 + 6x + 9 = x2 + 4x + 4 + 9 2x = 4 x = 2
If: 9+x = 3 then x = -6
9 + x = 3 x = 3-9 x = -6 Check 9 + (-6) = 3 9 - 6 = 3