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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 10000-50a <75a <75(200-a) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        10000 - 50 * a <75 * a         (1)
        75 * a <75 * ( 200 - a )         (2)

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    From inequality(1)：
         a ＞ 80
    From inequality(2)：
         a < 100

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    From inequalities (1) and (2)
         80 < a < 100     (3)

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    The final solution set is :
         80 < a < 100

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