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Solve: 4x – 5 > 10 – x, x ∈ {0, 1, 2, 3, 4, 5, 6, 7}

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4x – 5 > 10 – x, x ∈ N

⇒ 4x + x > 10 + 5

⇒ 5x > 15

⇒ x > (15/5) = 3

∴ x = 4, 5, 6, 7

Solution set = {4, 5, 6, 7}

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