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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2060/(220+60x) <5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2060 / ( 220 + 60 * x ) <5         (1)
        From the definition field of divisor
         220 + 60 * x ≠ 0        (2 )

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    From inequality(1)：
         x < -3.666667 或  x ＞ 16/5
    From inequality(2)：
         x < -11/3 或  x ＞ -11/3

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    From inequalities (1) and (2)
         x < -3.666667 或  x ＞ 16/5    (3)

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    The final solution set is :
         x < -3.666667 或  x ＞ 16/5

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