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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.2x+180/(x+5) ≤11.2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.2 * x + 180 / ( x + 5 ) ≤11.2         (1)
        From the definition field of divisor
         x + 5 ≠ 0        (2 )

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    From inequality(1)：
         x ≤ -5 或  20 ≤ x ≤ 31
    From inequality(2)：
         x < -5 或  x ＞ -5

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    From inequalities (1) and (2)
         x < -5 或  20 ≤ x ≤ 31    (3)

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    The final solution set is :
         x < -5 或  20 ≤ x ≤ 31

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