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Question
Solve: 15 – 2(2x – 1) < 15, x ∈ Z.
Solution
15 – 2(2x – 1) < 15, x ∈ Z.
⇒ 15 - 4x + 2 < 15
⇒ 17 - 4x < 15
⇒ - 4x < 15 - 17
⇒ - 4x < -2
⇒ `(-4)/(-4)"x" > (-2)/(-4) = 1/2` (Dividing by -4)
∴ x = 1, 2, 3, 4, 5, .....
∴ Solution set = {1, 2, 3, 4, 5,...}
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