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 2x+1 ≤3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * x + 1 ≤3         (1)

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    From inequality(1)：
         x ≤ 1

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    The final solution set is :
         x ≤ 1

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