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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1000A+800(20-A) ≤18000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1000 * A + 800 * ( 20 - A ) ≤18000         (1)

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    From inequality(1)：
         A ≤ 10

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    The final solution set is :
         A ≤ 10

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