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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality X÷(X+7) ≥0.6 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         X ÷ ( X + 7 ) ≥0.6         (1)

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    From inequality(1)：
         X ≤ -7 或  X ≥ 21/2

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    The final solution set is :
         X ≤ -7 或  X ≥ 21/2

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