3*x - 3 x + 1 ------- < 4 - ----- 6 2
(3*x - 3)/6 < -(x + 1)/2 + 4
And(-oo < x, x < 4)
(-oo < x)∧(x < 4)
(-oo, 4)
x in Interval.open(-oo, 4)