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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 80x+40(100-x) ≥6000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        80 * x + 40 * ( 100 - x ) ≥6000         (1)

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    From inequality(1)：
         x ≥ 50

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    The final solution set is :
         x ≥ 50
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 80x+40(100-x) ≤6120 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        80 * x + 40 * ( 100 - x ) ≤6120         (1)

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    From inequality(1)：
         x ≤ 53

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    The final solution set is :
         x ≤ 53

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