9=3n+n+1

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Solution for 9=3n+n+1 equation: 


n in (-oo:+oo)

9 = 3*n+n+1 // - 3*n+n+1

9-(3*n)-n-1 = 0

9-3*n-n-1 = 0

8-4*n = 0 // - 8

-4*n = -8 // : -4

n = -8/(-4)

n = 2

n = 2

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