Source: Official Guide for the GMAT 13th Ed. Problem Solving; #102 Official Guide for the GMAT 2015 14th Ed. Problem Solving; #102
Mike McGarry, Magoosh Tutor
Dec 28, 2013 • Comment
Yuri Lucatto Sillis
Hi Mike. Why can't I make the following:
290=(5k-160)/9 2610=5k-160 2450=5k k=490, hence choice C
Jun 5, 2015 • Reply
Jonathan , Magoosh Tutor
Hi Yuri. You should have added 160 to 2450 before dividing by 5. It looks like you subtracted instead. Otherwise, your method works, though it involves calculating larger numbers and may therefore take longer. I hope that helps.
Jun 15, 2015 • Reply
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