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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -0.2 <(x-77.8)/77.8 <0.2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -0.2 < ( x - 77.8 ) / 77.8         (1)
         ( x - 77.8 ) / 77.8 <0.2         (2)

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    From inequality(1)：
         x ＞ 1556/25
    From inequality(2)：
         x < 2334/25

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    From inequalities (1) and (2)
         1556/25 < x < 2334/25     (3)

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    The final solution set is :
         1556/25 < x < 2334/25

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