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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 200*0.61+200*0.66+0.92*（x-400） <= 300 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        200 * 0.61 + 200 * 0.66 + 0.92 * ( x - 400 ) <= 300         (1)

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    From inequality(1)：
         x ≤ 450

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    The final solution set is :
         x ≤ 450

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