Răspuns:
La a)
x - 5 > 0. x > 5
La b)
2x + 5 < 7, 2x < 7 - 5, 2x < 2, x < 1
La c)
3x >= - 15, x >= -15/3 , x >= -5.
La d)
-4x >= 12, x >= 12/-4, x>= 3.
La e)
2x - 1 <= 11, 2x <= 11 + 1, 2x <= 12, x <= 6.
La f)
-6 + 3x < x, 4x - 6 < 0, 4x < 6, x < 4/6, x < 2/3.
