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Question
Solve the following inequalities in the given universal set:
4x + 2 ≤ 2x - 7; x ∈ I
Solution
We have
4x + 2 ≤ 2x - 7; x ∈ I
⇒ 4x - 2x ≤ -7 -2
⇒ 2x ≤ -9
⇒ x ≤ -9/2
As x ∈ I, x can take values -5, -6, -7, ......,
so x = {-5, -6, -7, -8, .......,}
This set can be drawn on number line as x ≤ -9/2.
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