81=3n+3n+9

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Solution for 81=3n+3n+9 equation: 


n in (-oo:+oo)

81 = 3*n+3*n+9 // - 3*n+3*n+9

81-(3*n)-(3*n)-9 = 0

81-3*n-3*n-9 = 0

72-6*n = 0 // - 72

-6*n = -72 // : -6

n = -72/(-6)

n = 12

n = 12

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