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k in (-oo:+oo)
(5/6)*k+8/9 = 151/18 // - 151/18
(5/6)*k+8/9-(151/18) = 0
(5/6)*k+8/9-151/18 = 0
5/6*k-15/2 = 0 // + 15/2
5/6*k = 15/2 // : 5/6
k = 15/2/5/6
k = 9
k = 9
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