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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 60/(x+20)+1+40/(x-20) <= 5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        60 / ( x + 20 ) + 1 + 40 / ( x - 20 ) <= 5         (1)
        From the definition field of divisor
         x + 20 ≠ 0        (2 )
        From the definition field of divisor
         x - 20 ≠ 0        (3 )

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    From inequality(1)：
         x ≤ -20 或  -8.860009 ≤ x ≤ 20 或  x ≥ 33.860009
    From inequality(2)：
         x < -20 或  x ＞ -20
    From inequality(3)：
         x < 20 或  x ＞ 20

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    From inequalities (1) and (2)
         x < -20 或  -8.860009 ≤ x ≤ 20 或  x ≥ 33.860009    (4)
    From inequalities (3) and (4)
         x < -20 或  -8.860009 ≤ x < 20 或  x ≥ 33.860009    (5)

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    The final solution set is :
         x < -20 或  -8.860009 ≤ x < 20 或  x ≥ 33.860009

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