Solve: -3 + x < 2, x ∈ N.
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-3 + x < 2
⇒ x < 2 + 3
⇒ x < 5
∵ As x is a natural number.
Hence, solution set = {1, 2, 3, 4}.
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Solve: -5 (x + 4) > 30; x ∈ Z.
Solve and graph the solution set on a number line.
x - 5 < - 2; x ∈ N
3x - 1 > 5; x ∈ W