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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (5a-5)(25-a) >= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 5 * a - 5 ) * ( 25 - a ) >= 0         (1)

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    From inequality(1)：
         1 ≤ a ≤ 25

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    The final solution set is :
         1 ≤ a ≤ 25

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