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[求助]

斑竹,

    i want to ask some question about math,thank you.please send to "chenli781@263.sina.com:
    (10x+20y)/(x+y)=k  y>x   k=?
     [em01]
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I don't know what kind of answer we are supposed to give, but as far as the information given, my answer is K>15, (10(x+y)+5(y+y))/(x+y)=K, since y>x, then k>15, is that right?

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