-3k=21

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Solution for -3k=21 equation: 


k in (-oo:+oo)

-3*k = 21 // - 21

-3*k-21 = 0

-3*k-21 = 0 // + 21

-3*k = 21 // : -3

k = 21/(-3)

k = -7

k = -7

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