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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 5a+11(100-a) = <0.4*[10a+12(100-a)] .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        5 * a + 11 * ( 100 - a ) <0.4 * ( 10 * a + 12 * ( 100 - a ) )         (1)

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    From inequality(1)：
         a ＞ 119.230769

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    The final solution set is :
         a ＞ 119.230769

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