Gmatprep1 question

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Source: — Problem Solving |

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by diebeatsthegmat » Thu Sep 23, 2010 11:43 am
bkobilov wrote:What is the logic behind this problem?

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very simple
it means you have to add numbers together
4+x=1 >x=-3
4+y=-5 >> y=-9
4+z=m
e+z=10
e+x=7 or e=10
e+y=n =10-9=1 thus n=1
since e+z=10 and e=10 so z=0 so m=4
m+n=5

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by bkobilov » Thu Sep 23, 2010 11:53 am
diebeatsthegmat, thanks