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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 40x＋20（8－x） ≥200 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        40 * x + 20 * ( 8 - x ) ≥200         (1)

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    From inequality(1)：
         x ≥ 2

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    The final solution set is :
         x ≥ 2
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 10x十20（8一x） ≥120 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        10 * x + 20 * ( 8 - x ) ≥120         (1)

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    From inequality(1)：
         x ≤ 4

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    The final solution set is :
         x ≤ 4

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