Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 200*a+16000 <= 18000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        200 * a + 16000 <= 18000         (1)

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    From inequality(1)：
         a ≤ 10

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    The final solution set is :
         a ≤ 10
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 200*a+16000 >= 17400 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        200 * a + 16000 >= 17400         (1)

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    From inequality(1)：
         a ≥ 7

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    The final solution set is :
         a ≥ 7

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