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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality x1+x6 ≥60 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * 1 + x * 6 ≥60         (1)

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    From inequality(1)：
         x ≥ 60/7

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    The final solution set is :
         x ≥ 60/7
[ 2/2Inequality]
    Assignment:Find the solution set of inequality x1+x2 ≥70 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * 1 + x * 2 ≥70         (1)

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    From inequality(1)：
         x ≥ 70/3

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    The final solution set is :
         x ≥ 70/3

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