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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 13a+4.8*(20-a) <= 216 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        13 * a + 4.8 * ( 20 - a ) <= 216         (1)

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    From inequality(1)：
         a ≤ 14.634146

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    The final solution set is :
         a ≤ 14.634146

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