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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 45x+30(6-x) >= 240 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        45 * x + 30 * ( 6 - x ) >= 240         (1)

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    From inequality(1)：
         x ≥ 4

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    The final solution set is :
         x ≥ 4
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 400x+300(6-x) <= 2300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        400 * x + 300 * ( 6 - x ) <= 2300         (1)

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    From inequality(1)：
         x ≤ 5

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    The final solution set is :
         x ≤ 5

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