Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 7y <4y+20 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        7 * y <4 * y + 20         (1)

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    From inequality(1)：
         y < 20/3

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    The final solution set is :
         y < 20/3
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 4y+20 <8y .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4 * y + 20 <8 * y         (1)

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    From inequality(1)：
         y ＞ 5

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    The final solution set is :
         y ＞ 5

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