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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 140 >7/(0.075-r) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        140 >7 / ( 0.075 - r )         (1)
        From the definition field of divisor
         0.075 - x ≠ 0        (2 )

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    From inequality(1)：
         r ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(2)：
         r < 3/40 或  r ＞ 3/40

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    From inequalities (1) and (2)
         r < 3/40 或  r ＞ 3/40    (3)

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    The final solution set is :
         r < 3/40 或  r ＞ 3/40

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