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x = y + z

or, x-y = z

Question is x > y?

This translates to is x – y>0

or, z>0

1) Y>0

Not sufficient.

2) Z>0

Hence Statement 2 is sufficient .

Answer B
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We have to prove X>Y or X-Y>0;
Given X=Y+Z or X-Y=Z
1)Y>0 insufficient
2)Z>0 or X-Y=Z>0 Sufficient.
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given x=y+z; x-y=z
is x>y? --> x-y>0 --> z>0 ?

a) y>0 . no information on z. insufficient

b) z>0. Sufficient

B answer
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Hello from the GMAT Club BumpBot!

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