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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （2－1.8）×（600-x）+（6000-x）×（3-2.5）x ≥1800 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 2 - 1.8 ) × ( 600 - x ) + ( 6000 - x ) × ( 3 - 2.5 ) * x ≥1800         (1)

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    From inequality(1)：
         x ≥ 0.56009

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    The final solution set is :
         x ≥ 0.56009

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