-3k+9-4k=30

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Solution for -3k+9-4k=30 equation: 


k in (-oo:+oo)

9-3*k-(4*k) = 30 // - 30

9-3*k-(4*k)-30 = 0

9-3*k-4*k-30 = 0

-7*k-21 = 0 // + 21

-7*k = 21 // : -7

k = 21/(-7)

k = -3

k = -3

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