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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality -400a+300(16-a) ≤ 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -400 * a + 300 * ( 16 - a ) ≤ 0         (1)

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    From inequality(1)：
         a ≥ 48/7

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    The final solution set is :
         a ≥ 48/7
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 5/2a+2a ≥32 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        5 / 2 * a + 2 * a ≥32         (1)

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    From inequality(1)：
         a ≥ 64/9

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    The final solution set is :
         a ≥ 64/9

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