good gmat prep question

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by Anurag@Gurome » Sun Jul 01, 2012 9:45 am

hey_thr67 wrote:If xy + z = x(y + z) which of the following must be true?

--> (xy + z) = x(y + z) = xy + xz
--> (xz - z) = 0
--> z(x - 1) = 0

Hence, either z = 0 or x = 1

The correct answer is E.

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