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Let's assume that a, b, and c are the solutions to the inequality. In order for the inequality to include 12, 13, and 14, the inequality sign must be inclusive, either "β€" or "β₯".
If the inequality sign is "β€", the inequality that has solutions including 12, 13, and 14 is: a β€ b β€ c.
If the inequality sign is "β₯", the inequality that has solutions including 12, 13, and 14 is: a β₯ b β₯ c.
Both of these inequalities include 12, 13, and 14 as solutions.