Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 103z+56（20-z） <= 1550 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        103 * z + 56 * ( 20 - z ) <= 1550         (1)

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    From inequality(1)：
         z ≤ 9.148936

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    The final solution set is :
         z ≤ 9.148936

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