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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 4x+2.5（60-x） ≤198 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4 * x + 2.5 * ( 60 - x ) ≤198         (1)

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    From inequality(1)：
         x ≤ 32

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    The final solution set is :
         x ≤ 32
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 1.5x+3.5（60-x） ≤150 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        1.5 * x + 3.5 * ( 60 - x ) ≤150         (1)

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    From inequality(1)：
         x ≥ 30

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    The final solution set is :
         x ≥ 30

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