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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 150z+100(12-z) ≥1500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        150 * z + 100 * ( 12 - z ) ≥1500         (1)

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    From inequality(1)：
         z ≥ 6

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    The final solution set is :
         z ≥ 6
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 5000z+3000(12-z) <54000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        5000 * z + 3000 * ( 12 - z ) <54000         (1)

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    From inequality(1)：
         z < 9

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    The final solution set is :
         z < 9

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