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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 180x-xx-720 ≥500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        180 * x - x * x - 720 ≥500         (1)

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    From inequality(1)：
         7.054235 ≤ x ≤ 172.945765

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    The final solution set is :
         7.054235 ≤ x ≤ 172.945765

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