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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 28xx23（5000-x）小于等于15000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        28 * x * x * 23 * ( 5000 - x ) ≤15000         (1)

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    From inequality(1)：
         -0.068252 ≤ x ≤ 0.068253

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    The final solution set is :
         -0.068252 ≤ x ≤ 0.068253

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