9+2n-6n=21

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Solution for 9+2n-6n=21 equation: 


n in (-oo:+oo)

2*n-(6*n)+9 = 21 // - 21

2*n-(6*n)-21+9 = 0

2*n-6*n-21+9 = 0

-4*n-12 = 0 // + 12

-4*n = 12 // : -4

n = 12/(-4)

n = -3

n = -3

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