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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 40+2.5 ≤50(1-y) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        40 + 2.5 ≤50 * ( 1 - y )         (1)

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    From inequality(1)：
         y ≤ 3/20

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    The final solution set is :
         y ≤ 3/20

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