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integer

by ketkoag » Tue Jun 09, 2009 7:08 am
3) x and y are integers, x=?
1) 5(x+1)=5x+y
2) (x+5)*(y-5)=0
answer to this question would be E, right? OA to this question is not given
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Source: — Data Sufficiency |
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by ssmiles08 » Tue Jun 09, 2009 8:13 am
IMO E as well. x can be any number and the equations can both equal 0.
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by nitya34 » Tue Jun 09, 2009 9:25 am
why not C?

(1) gives y=5
(2) gives y=5,x=-5
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by Claret » Tue Jun 09, 2009 9:46 am
if you plug in 5 for y in the second equation, the left hand side would be equal to the right hand side (i.e 0) for any value of 'x'

so a unique value of 'x' cannot be determined! hence E
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by sanjay_dce » Thu Jun 11, 2009 10:43 am
nitya34 wrote:why not C?

(1) gives y=5
(2) gives y=5,x=-5
from second stm2 we can conclude that either x = -5 or y =5 you have used and instead of or.... hope to help
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