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x(9+x)=x^2 + 9x
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x(9+x)
Let the number be x and if 9+2x = 15 then x equals 3
9 x 9 x 9 x 9 x 9, or 9^5, is equal to 59049.
2(x + 9) = 2x + 18
(4 x 9) + (5 x 9) = (9 x 9)c= 81
9(6 + x) = 1