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GMAT Prep Math Question

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mjogan
 Post subject: GMAT Prep Math Question
 Post Posted: Tue Jun 21, 2011 9:48 pm 
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Course Students


Posts: 1
If m>0 and n>0, is (m+x)/(n+x) > m/n?

1) m<n
2) x>0

Answer: C

I'm having trouble manipulating the inequality in the question. Once you bring m/n to the left side, how do you get x(n-m)/n(n+x)? I saw that in a previous post.

Thanks
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george.kourdin
 Post subject: Re: GMAT Prep Math Question
 Post Posted: Wed Jun 22, 2011 8:45 am 
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Course Students


Posts: 98
i realize that this doesn't answer your question, but why do we need to simplify the equation - move stuff around?

for us to answer whether m+x/n+x to be > m/n two things need to be true

1) x ! = 0
2) we need to know the relationship between m and n
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RonPurewal
 Post subject: Re: GMAT Prep Math Question
 Post Posted: Wed Jun 29, 2011 6:05 am 
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ManhattanGMAT Staff


Posts: 7146
please read this thread and post any questions that you may have there, not here.
if-m-0-and-n-0-is-m-x-n-x-m-n-t8202.html
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