|4*x + 1| - |x + 2| >= |2*x - 3|
-|x + 2| + |4*x + 1| >= |2*x - 3|
(-oo, -2] U [4/5, oo)
x in Union(Interval(-oo, -2), Interval(4/5, oo))
Or(And(4/5 <= x, x < oo), And(x <= -2, -oo < x))
((4/5 <= x)∧(x < oo))∨((x <= -2)∧(-oo < x))