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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 55x+150(30-x) < 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        55 * x + 150 * ( 30 - x ) < 0         (1)

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    From inequality(1)：
         x ＞ 47.368421

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    The final solution set is :
         x ＞ 47.368421

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