-3n+6=-9

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


n in (-oo:+oo)

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

6-3*n+9 = 0

15-3*n = 0 // - 15

-3*n = -15 // : -3

n = -15/(-3)

n = 5

n = 5

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