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m+n=??

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m+n=?? [#permalink] New post 10 Sep 2009, 09:22
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A
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Difficulty:

(N/A)

Question Stats:

100% (02:06) correct 0% (00:00) wrong based on 1 sessions
i guessed this problem right... but cant figure it out! thanks!
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Intern
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Re: m+n=?? [#permalink] New post 10 Sep 2009, 09:49
nevermind. i figured it out. :) if i actually write down and work with the matrix... it works out MUCH better and less confusing. thanks everyone.

steps i took (while replacing the variables in matrix):
1) x must be (-3) b/c 4+x=1
2) e must be (10) b/c e-3=7
3) z must be (0) b/c 10+z=10
4) m must be (4) b/c 4+0=m
5) y must be (-9) b/c 4+y=-5
6) n must be (1) b/c 10+(-9)=1

therefore: m+n= 4+1 = 5
Manager
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Re: m+n=?? [#permalink] New post 11 Sep 2009, 13:33
z + 4 = m
e + y = n

=> z + 4 + e + y = m + n
=> (z + e ) + (4 + y ) = m + n
=> 10 - 5 = m + n = 5
Senior Manager
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Re: m+n=?? [#permalink] New post 11 Sep 2009, 13:37
(z+4) + (y+e) = m+n
but z+e = 10 and y+4 = -5
So, m+n = 10-5 = 5
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Schools: Darden:Tepper:UCUIC:Kenan Flager:Nanyang:NUS:ISB:UCI Merage:Emory
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Re: m+n=?? [#permalink] New post 14 Sep 2009, 04:58
Hi i have a general question....is the gmat questioning the additional table properties as well?/
can u please tell me the source of the question??
_________________

Second cut is the deepest cut!!!:P

Re: m+n=??   [#permalink] 14 Sep 2009, 04:58
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