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k in (-oo:+oo)
(1/6)*k+8 = 4*k+107/22 // - 4*k+107/22
(1/6)*k-(4*k)-(107/22)+8 = 0
(1/6)*k-4*k-107/22+8 = 0
69/22-23/6*k = 0 // - 69/22
-23/6*k = -69/22 // : -23/6
k = -69/22/(-23/6)
k = 9/11
k = 9/11
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