-99=6n+3n+9

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Solution for -99=6n+3n+9 equation: 


n in (-oo:+oo)

-99 = 6*n+3*n+9 // - 6*n+3*n+9

-(6*n)-(3*n)-99-9 = 0

-6*n-3*n-99-9 = 0

-9*n-108 = 0 // + 108

-9*n = 108 // : -9

n = 108/(-9)

n = -12

n = -12

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