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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (100-x-20)×x+1600 ≤(2500/9)+1600 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 100 - x - 20 ) × x + 1600 ≤ ( 2500 / 9 ) + 1600         (1)

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    From inequality(1)：
         x ≤ 3.637626 或  x ≥ 76.362374

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    The final solution set is :
         x ≤ 3.637626 或  x ≥ 76.362374

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