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k in (-oo:+oo)
5*k-(6/7) > 6 // - 6
5*k-(6/7)-6 > 0
5*k-6/7-6 > 0
5*k-48/7 > 0 // + 48/7
5*k > 48/7 // : 5
k > 48/7/5
k > 48/35
k in (48/35:+oo)
(48/35:+oo)
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