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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 1-a >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1 - a >0         (1)

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    From inequality(1)：
         a < 1

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    The final solution set is :
         a < 1
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 2a+6 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * a + 6 <0         (1)

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    From inequality(1)：
         a < -3

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    The final solution set is :
         a < -3

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