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-4 < 3 - 2x < 4
-7 < - 2x < 1
7/2 < x < 1/2.
.
b) - 9 ≥ x/2 + 5 ≥ 9
-18 ≥ x +10 ≥ 18
-28 ≥ x ≥ 8
.
c)
-5 ≤ 3x+2 ≤ 5
-7 ≤ 3x ≤ 3
-7/3 ≤ x ≤ 1