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k in (-oo:+oo)
2*k-(5/9) > 5 // - 5
2*k-(5/9)-5 > 0
2*k-5/9-5 > 0
2*k-50/9 > 0 // + 50/9
2*k > 50/9 // : 2
k > 50/9/2
k > 25/9
k in (25/9:+oo)
(25/9:+oo)
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