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k in (-oo:+oo)
-5*k-(2/3) = 118/3 // - 118/3
-5*k-(2/3)-(118/3) = 0
-5*k-2/3-118/3 = 0
-5*k-40 = 0 // + 40
-5*k = 40 // : -5
k = 40/(-5)
k = -8
k = -8
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