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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 37500 <= 650m+400(75-m) <= 38500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        37500 <= 650 * m + 400 * ( 75 - m )         (1)
         650 * m + 400 * ( 75 - m ) <= 38500         (2)

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    From inequality(1)：
         m ≥ 30
    From inequality(2)：
         m ≤ 34

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    From inequalities (1) and (2)
         30 ≤ m ≤ 34    (3)

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    The final solution set is :
         30 ≤ m ≤ 34

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