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wish this not be question #10

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by sanju09 » Fri Jan 24, 2014 10:48 pm
Is x = y?

(1) x subtracted from twice of y gives the same result as y added to x.
(2) y added to twice of x is 20 more than x.

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Source: — Data Sufficiency |
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by theCodeToGMAT » Sat Jan 25, 2014 9:30 pm
To find: x = y

Statement 1:
2y - x = y + x
y = 2x
We dont know whether x & y are 0.
INSUFFICIENT

Statement 2:
2x + y = x + 20
x + y = 20
We cannot comment on x & y values
INSUFFICIENT

Combining...
y = 2x
x + y = 20
We can solve and get the results.
SUFFICIENT
[spoiler]{C}[/spoiler]
Last edited by theCodeToGMAT on Mon Jan 27, 2014 7:19 pm, edited 1 time in total.
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by Bill@VeritasPrep » Mon Jan 27, 2014 3:29 pm
theCodeToGMAT wrote:To find: x = y

Statement 1:
2y - x = y - x
y = 0
We dont know about "x"
INSUFFICIENT

Statement 2:
2x + y = x + 20
x + y = 20
We cannot comment on x & y values
INSUFFICIENT

Combining...
y = 0
x + y = 20
that impiles, x = 20
We can answer that x !=y
SUFFICIENT
[spoiler]{C}?[/spoiler]
I think your first statement should be 2y - x = y + x ("gives the same result as y added to x")
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by theCodeToGMAT » Mon Jan 27, 2014 7:14 pm
Bill@VeritasPrep wrote: I think your first statement should be 2y - x = y + x ("gives the same result as y added to x")
yeah correct! :oops:
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