6 + 5 < x + 5 ≤ 11 + 5
11 < x + 5 ≤ 16
6 - 7 < x - 7 ≤ 11 - 7
-1 < x - 7 ≤ 4
6 * 0,4 < 0,4x ≤ 11 * 0,4
2,4 < 0,4x ≤ 4,4
6 * 1/6 < x * 1/6 ≤ 11 * 1/6
1 < x * 1/6 ≤ 11/6
1 < x * 1/6 ≤ 1 5/6
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Answers & Comments
6 < x ≤ 11
Условие 1.
6 + 5 < x + 5 ≤ 11 + 5
11 < x + 5 ≤ 16
Условие 2.
6 - 7 < x - 7 ≤ 11 - 7
-1 < x - 7 ≤ 4
Условие 3.
6 * 0,4 < 0,4x ≤ 11 * 0,4
2,4 < 0,4x ≤ 4,4
Условие 4.
6 * 1/6 < x * 1/6 ≤ 11 * 1/6
1 < x * 1/6 ≤ 11/6
1 < x * 1/6 ≤ 1 5/6