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Question
Solve the inequation 18 – 3 (2x – 5) > 12; x ∈ W.
Solution
18 – 3 (2x – 5) > 12; x ∈ W.
⇒ 18 - 6x + 15 > 12
⇒ 33 - 6x > 12
⇒ - 33 + 33 - 6x > 12 - 333
⇒ - 6x < - 21
⇒ `(-6x)/(-6)< (-21)/-6`
⇒ n <`21/6`
⇒ n < 3.5
But x ∈ W, x = 0, 1, 2, 3
∴ Solution set = {0, 1, 2, 3}
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