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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (0.9*160)a+(0.85*110)(20-a) ≤2100 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 0.9 * 160 ) * a + ( 0.85 * 110 ) * ( 20 - a ) ≤2100         (1)

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    From inequality(1)：
         a ≤ 460/101

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    The final solution set is :
         a ≤ 460/101

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