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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (60+x)-490/(60+x) >0.3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 60 + x ) - 490 / ( 60 + x ) >0.3         (1)
        From the definition field of divisor
         60 + x ≠ 0        (2 )

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    From inequality(1)：
         -81.986452 < x < -60 或  x ＞ -37.713548
    From inequality(2)：
         x < -60 或  x ＞ -60

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    From inequalities (1) and (2)
         -81.986452 < x < -60 或  x ＞ -37.713548    (3)

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    The final solution set is :
         -81.986452 < x < -60 或  x ＞ -37.713548

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