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k in (-oo:+oo)
2*k-(5/(-7)) > 5 // - 5
2*k-(5/(-7))-5 > 0
2*k+5/7-5 > 0
2*k-30/7 > 0 // + 30/7
2*k > 30/7 // : 2
k > 30/7/2
k > 15/7
k in (15/7:+oo)
(15/7:+oo)
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