Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3x＋3 ≥2x＋5 ≥x＋9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        3 * x + 3 ≥2 * x + 5         (1)
        2 * x + 5 ≥ x + 9         (2)

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    From inequality(1)：
         x ≥ 2
    From inequality(2)：
         x ≥ 4

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    From inequalities (1) and (2)
         x ≥ 4    (3)

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    The final solution set is :
         x ≥ 4

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