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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 30x+450-45x <= 360 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        30 * x + 450 - 45 * x <= 360         (1)

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    From inequality(1)：
         x ≥ 6

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    The final solution set is :
         x ≥ 6
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 60x+1000-100x >= 680 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        60 * x + 1000 - 100 * x >= 680         (1)

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    From inequality(1)：
         x ≤ 8

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    The final solution set is :
         x ≤ 8

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