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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 11a+25(15-a) <220 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        11 * a + 25 * ( 15 - a ) <220         (1)

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    From inequality(1)：
         a ＞ 11.071429

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    The final solution set is :
         a ＞ 11.071429

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