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

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

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    From inequality(1)：
         x < -1

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    The final solution set is :
         x < -1
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 3-x ≤1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 - x ≤1         (1)

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    From inequality(1)：
         x ≥ 2

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    The final solution set is :
         x ≥ 2

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