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k in (-oo:+oo)
(5/6)*k+1/10 = 49/240 // - 49/240
(5/6)*k+1/10-(49/240) = 0
(5/6)*k+1/10-49/240 = 0
5/6*k-5/48 = 0 // + 5/48
5/6*k = 5/48 // : 5/6
k = 5/48/5/6
k = 1/8
k = 1/8
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