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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality x <= 2/3(150-x) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x <= 2 / 3 * ( 150 - x )         (1)

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    From inequality(1)：
         x ≤ 60

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    The final solution set is :
         x ≤ 60
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 100*x+120(150-x) <= 17000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        100 * x + 120 * ( 150 - x ) <= 17000         (1)

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    From inequality(1)：
         x ≥ 50

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    The final solution set is :
         x ≥ 50

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