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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 7000+7000×0.75x <7000×80%x .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        7000 + 7000 × 0.75 * x <7000 × 80 % * x         (1)

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    From inequality(1)：
         x ＞ 20

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    The final solution set is :
         x ＞ 20

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