81=k/3

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Solution for 81=k/3 equation: 


k in (-oo:+oo)

81 = k/3 // - k/3

81-(k/3) = 0

81-1/3*k = 0 // - 81

-1/3*k = -81 // : -1/3

k = -81/(-1/3)

k = 243

k = 243

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