Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 12 <2-a <13 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        12 <2 - a         (1)
        2 - a <13         (2)

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    From inequality(1)：
         a < -10
    From inequality(2)：
         a ＞ -11

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    From inequalities (1) and (2)
         -11 < a < -10     (3)

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    The final solution set is :
         -11 < a < -10

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