Solve: 9x - 7 ≤ 28 + 4x; x ∈ W.
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If the replacement set is the set of natural numbers, solve:
(i) x - 5 < 0
(ii) x + 1 ≤ 7
(iii) 3x - 4 > 6
(iv) 4x + 1 ≥ 17
If the replacement set = {-6, -3, 0, 3, 6, 9}, find the truth set of the following:
(i) 2x - 1 > 9
(ii) 3x + 7 ≤ 1
Solve: -5 (x + 4) > 30; x ∈ Z.