-3k-6=-21

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Solution for -3k-6=-21 equation: 


k in (-oo:+oo)

-3*k-6 = -21 // + 21

21-3*k-6 = 0

15-3*k = 0 // - 15

-3*k = -15 // : -3

k = -15/(-3)

k = 5

k = 5

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