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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 50 ≤31.3+C-C×6%/4 ≤60 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        50 ≤31.3 + C - C × 6 % / 4         (1)
        31.3 + C - C × 6 % / 4 ≤60         (2)

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    From inequality(1)：
         C ≥ 18.984772
    From inequality(2)：
         C ≤ 29.137056

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    From inequalities (1) and (2)
         18.984772 ≤ C ≤ 29.137056    (3)

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    The final solution set is :
         18.984772 ≤ C ≤ 29.137056

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