(1)
-3 < x < 0
-6 < 2x < 0
-4 < 2x + 2 < 2
-4 < y < 2
(2)
-2 ≤ y ≤ 2
-2 ≤ 2x + 2 ≤ 2
-4 ≤ 2x ≤ 0
-2 ≤ x ≤ 0