Overview: 3 questions will be solved this time.Among them
           ☆3 inequalities

[ 1/3Inequality]
    Assignment:Find the solution set of inequality x+1 <−7 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x + 1 < -7         (1)

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    From inequality(1)：
         x < -8

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    The final solution set is :
         x < -8
[ 2/3Inequality]
    Assignment:Find the solution set of inequality x <−6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x < -6         (1)

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    From inequality(1)：
         x < -6

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    The final solution set is :
         x < -6
[ 3/3Inequality]
    Assignment:Find the solution set of inequality x >−6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x > -6         (1)

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    From inequality(1)：
         x ＞ -6

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    The final solution set is :
         x ＞ -6

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