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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2x+1 >7x <2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        2 * x + 1 >7 * x         (1)
        7 * x <2         (2)

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    From inequality(1)：
         x < 1/5
    From inequality(2)：
         x < 2/7

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    From inequalities (1) and (2)
         x < 1/5    (3)

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    The final solution set is :
         x < 1/5

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