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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 12x+10(8-x) <= 89 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        12 * x + 10 * ( 8 - x ) <= 89         (1)

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    From inequality(1)：
         x ≤ 9/2

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    The final solution set is :
         x ≤ 9/2
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 200x+(8-x)*160 >= 1380 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        200 * x + ( 8 - x ) * 160 >= 1380         (1)

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    From inequality(1)：
         x ≥ 5/2

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    The final solution set is :
         x ≥ 5/2

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