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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 108y+156(400-y) ≤48000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        108 * y + 156 * ( 400 - y ) ≤48000         (1)

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    From inequality(1)：
         y ≥ 300

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    The final solution set is :
         y ≥ 300
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 61y+51(400-y) ≤24000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        61 * y + 51 * ( 400 - y ) ≤24000         (1)

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    From inequality(1)：
         y ≤ 360

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    The final solution set is :
         y ≤ 360

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