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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (60-x)(200+20x) ≥24500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 60 - x ) * ( 200 + 20 * x ) ≥24500         (1)

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    From inequality(1)：
         25 ≤ x ≤ 25

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    The final solution set is :
         25 ≤ x ≤ 25

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