If the replacement set is the set of whole numbers, solve :
8 - x > 5
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⇒ -x > 5 - 8
⇒ -x > -3
Multiplying both sides by (-1) we get,
⇒ x < 3 (As on multiplying by negative no. the sign reverses.)
Since, x ∈ W
∴ Solution set = {0, 1, 2}.
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x + 7 ≤ 11
3x - 1 > 8
Solve the inequation :
3 - 2x ≥ x - 12 given that x ∈ N.