-3 ≤ 1-2х < 4
-3-1≤ -2х < 4-1
-4≤ -2х < 3
-3/2< х≤ 2
-1,5< х≤ 2
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-3 ≤ 1-2х < 4
-3-1≤ -2х < 4-1
-4≤ -2х < 3
-3/2< х≤ 2
-1,5< х≤ 2