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## GMATPrep Test 1 #2_PS #2

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kwah Rising GMAT Star
Joined
04 Jan 2012
Posted:
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GMATPrep Test 1 #2_PS #2 Sun Mar 11, 2012 9:20 pm
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
What is the most efficient way to achieve the result for the question attached?

Thanks,
K
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### GMAT/MBA Expert

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Mon Mar 12, 2012 8:13 pm
simplify first to this:

xy +z = xy + xz

then

z = xz

when is this true?

both sides will be 0 if z = 0 or

both sides will be z if x = 1

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