|x - 6| ------------- <= 1 2*x - |x + 3|
|x - 6|/(2*x - |x + 3|) <= 1
Or(And(9/2 <= x, x < oo), And(-oo < x, x < 3))
((9/2 <= x)∧(x < oo))∨((-oo < x)∧(x < 3))
(-oo, 3) U [9/2, oo)
x in Union(Interval.open(-oo, 3), Interval(9/2, oo))