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k in (-oo:+oo)
(1/2)*k+2 = (5/6)*k+5 // - (5/6)*k+5
(1/2)*k-((5/6)*k)-5+2 = 0
(1/2)*k+(-5/6)*k-5+2 = 0
-1/3*k-3 = 0 // + 3
-1/3*k = 3 // : -1/3
k = 3/(-1/3)
k = -9
k = -9
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