-1 ≤ (12 - 2x)/5 ≤ 1
-5 ≤ 12 - 2x ≤ 5
-5 - 12 ≤ -2x ≤ 5 - 12
-17 ≤ -2x ≤ -7
17 ≥ 2x ≥ 7
7 ≤ 2x ≤ 17
7/2 ≤ x ≤ 17/2
3,5 ≤ x ≤ 8,5
x ∈ [3,5; 8,5]
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Answers & Comments
-1 ≤ (12 - 2x)/5 ≤ 1
-5 ≤ 12 - 2x ≤ 5
-5 - 12 ≤ -2x ≤ 5 - 12
-17 ≤ -2x ≤ -7
17 ≥ 2x ≥ 7
7 ≤ 2x ≤ 17
7/2 ≤ x ≤ 17/2
3,5 ≤ x ≤ 8,5
x ∈ [3,5; 8,5]