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r in (-oo:+oo)
8*r-(r/6) > 1/6-8 // - 1/6-8
8*r-(r/6)-(1/6)+8 > 0
8*r-(r/6)-1/6+8 > 0
47/6*r+47/6 > 0 // - 47/6
47/6*r > -47/6 // : 47/6
r > -47/6/47/6
r > -1
r in (-1:+oo)
(-1:+oo)
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