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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (9225+90x)/(117+x) >= 80 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 9225 + 90 * x ) / ( 117 + x ) >= 80         (1)
        From the definition field of divisor
         117 + x ≠ 0        (2 )

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    From inequality(1)：
         x ≤ -117 或  x ≥ 27/2
    From inequality(2)：
         x < -117 或  x ＞ -117

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    From inequalities (1) and (2)
         x < -117 或  x ≥ 27/2    (3)

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    The final solution set is :
         x < -117 或  x ≥ 27/2

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