a/3x3=9

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Solution for a/3x3=9 equation: 


x in (-oo:+oo)

(a/3)*x^3 = 9 // - 9

(a/3)*x^3-9 = 0

1/3*a*x^3 = 9 // : 1/3*a

x^3 = 27*a^-1

x^3 = 27*a^-1 // ^ 1/3

x = 3*a^(-1/3)

x = 3*a^(-1/3)

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