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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1+16*(x+80)/(x+80+2000)+0.8)*0.9 >= (1+16*x/(x+2000)+0.15)*1.1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 + 16 * ( x + 80 ) / ( x + 80 + 2000 ) + 0.8 ) * 0.9 >= ( 1 + 16 * x / ( x + 2000 ) + 0.15 ) * 1.1         (1)
        From the definition field of divisor
         x + 80 + 2000 ≠ 0        (2 )
        From the definition field of divisor
         x + 2000 ≠ 0        (3 )

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    From inequality(1)：
         x ≤ √309607793/√999
    From inequality(2)：
         x < -2080 或  x ＞ -2080
    From inequality(3)：
         x < -2000 或  x ＞ -2000

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    From inequalities (1) and (2)
         x < -2080 或  -2080 < x ≤ √309607793/√999     (4)
    From inequalities (3) and (4)
         x < -2080 或  -2080 < x < -2000 或  -2000 < x ≤ √309607793/√999     (5)

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    The final solution set is :
         x < -2080 或  -2080 < x < -2000 或  -2000 < x ≤ √309607793/√999

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