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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 200（1-15%）*40+200a-8000 ≥3000*70% .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        200 * ( 1 - 15 % ) * 40 + 200 * a - 8000 ≥3000 * 70 %         (1)

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    From inequality(1)：
         a ≥ 33/2

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    The final solution set is :
         a ≥ 33/2

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