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k in (-oo:+oo)
5*k-(4/(-7)) > 4 // - 4
5*k-(4/(-7))-4 > 0
5*k+4/7-4 > 0
5*k-24/7 > 0 // + 24/7
5*k > 24/7 // : 5
k > 24/7/5
k > 24/35
k in (24/35:+oo)
(24/35:+oo)
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