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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 3d+3 <= -1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 * d + 3 <= -1         (1)

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    From inequality(1)：
         d ≤ -4/3

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    The final solution set is :
         d ≤ -4/3
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 5d+2 >= 12 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        5 * d + 2 >= 12         (1)

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    From inequality(1)：
         d ≥ 2

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    The final solution set is :
         d ≥ 2

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