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

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

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    From inequality(1)：
         a < 7
    From inequality(2)：
         a ＞ 1

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    From inequalities (1) and (2)
         1 < a < 7     (3)

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    The final solution set is :
         1 < a < 7

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