Solve and graph the solution set on a number line.
x - 5 < - 2; x ∈ N
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x - 5 < - 2
⇒ x < - 2 + 5
⇒ x < 3
∵ As x is a natural number.
Hence, solution set = {1, 2}.
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Solve: -3 + x < 2, x ∈ N.
3x - 1 > 5; x ∈ W
-3x + 12 < - 15; x ∈ R