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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x-x*2% ≥1640 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x - x * 2 % ≥1640         (1)

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    From inequality(1)：
         x ≥ 1673.469388

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    The final solution set is :
         x ≥ 1673.469388

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