1 1 ----- > ------- x - 4 2*x - 1
1/(x - 4) > 1/(2*x - 1)
Or(And(-3 < x, x < 1/2), And(4 < x, x < oo))
((-3 < x)∧(x < 1/2))∨((4 < x)∧(x < oo))
(-3, 1/2) U (4, oo)
x in Union(Interval.open(-3, 1/2), Interval.open(4, oo))