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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 20x+15（16000-x） ≤【50x+60（16000-x）】*30% .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        20 * x + 15 * ( 16000 - x ) ≤ ( 50 * x + 60 * ( 16000 - x ) ) * 30 %         (1)

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    From inequality(1)：
         x ≤ 6000

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    The final solution set is :
         x ≤ 6000

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