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

[ 1/2Inequality]
    Assignment:Find the solution set of inequality (480-w)*30400 >(380-w)*76000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 480 - w ) * 30400 > ( 380 - w ) * 76000         (1)

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    From inequality(1)：
         w ＞ 313.333333

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    The final solution set is :
         w ＞ 313.333333
[ 2/2Inequality]
    Assignment:Find the solution set of inequality (480-w)*30400 >(280-w)*152000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 480 - w ) * 30400 > ( 280 - w ) * 152000         (1)

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    From inequality(1)：
         w ＞ 230

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    The final solution set is :
         w ＞ 230

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