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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 9−2a >1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        9 - 2 * a >1         (1)

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    From inequality(1)：
         a < 4

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    The final solution set is :
         a < 4
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 6−4a <−22 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        6 - 4 * a < -22         (1)

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    From inequality(1)：
         a ＞ 7

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    The final solution set is :
         a ＞ 7

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