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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 35 ≤a ≤3(50-a) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        35 ≤ a         (1)
         a ≤3 * ( 50 - a )         (2)

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    From inequality(1)：
         a ≥ 35
    From inequality(2)：
         a ≤ 75/2

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    From inequalities (1) and (2)
         35 ≤ a ≤ 75/2    (3)

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    The final solution set is :
         35 ≤ a ≤ 75/2

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