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Question
If – 2x + 1 ≥ 9, then x ______ – 4.
Solution
If – 2x + 1 ≥ 9, then x ≤ – 4.
Explanation:
If – 2x + 1 ≥ 9 then
– 2x ≥ 9 – 1
⇒ – 2x ≥ 8
⇒ 2x ≤ – 8
⇒ x ≤ – 4
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