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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality X+7大于100X-7小于90 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
         X + 7 >100 * X - 7         (1)
        100 * X - 7 <90         (2)

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    From inequality(1)：
         X < 14/99
    From inequality(2)：
         X < 97/100

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    From inequalities (1) and (2)
         X < 14/99    (3)

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    The final solution set is :
         X < 14/99

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