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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1-x)/(3x+5) ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 - x ) / ( 3 * x + 5 ) ≥0         (1)
        From the definition field of divisor
         3 * x + 5 ≠ 0        (2 )

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    From inequality(1)：
         -1.666667 ≤ x ≤ 1
    From inequality(2)：
         x < -5/3 或  x ＞ -5/3

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    From inequalities (1) and (2)
         -5/3 < x ≤ 1     (3)

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    The final solution set is :
         -5/3 < x ≤ 1

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