4=k/7

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Solution for 4=k/7 equation: 


k in (-oo:+oo)

4 = k/7 // - k/7

4-(k/7) = 0

4-1/7*k = 0 // - 4

-1/7*k = -4 // : -1/7

k = -4/(-1/7)

k = 28

k = 28

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