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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （25＋x）(80000－2000x) ≥200 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 25 + x ) * ( 80000 - 2000 * x ) ≥200         (1)

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    From inequality(1)：
         -24.998462 ≤ x ≤ 39.998462

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    The final solution set is :
         -24.998462 ≤ x ≤ 39.998462

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