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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (31+x)/(49+x) >0.85 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 31 + x ) / ( 49 + x ) >0.85         (1)
        From the definition field of divisor
         49 + x ≠ 0        (2 )

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    From inequality(1)：
         x < -49 或  x ＞ 71
    From inequality(2)：
         x < -49 或  x ＞ -49

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    From inequalities (1) and (2)
         x < -49 或  x ＞ 71    (3)

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    The final solution set is :
         x < -49 或  x ＞ 71

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