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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 120a+4500-90a ≤5500 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        120 * a + 4500 - 90 * a ≤5500         (1)

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    From inequality(1)：
         a ≤ 100/3

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    The final solution set is :
         a ≤ 100/3

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