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cks: Junior | Next Rank: 30 Posts; Posts: 21; Joined: Mon Dec 24, 2007 7:11 am

by cks » Mon Dec 24, 2007 4:57 pm

Pls explain..

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Source: Beat The GMAT — Problem Solving | Mon Dec 24, 2007 4:57 pm

beingAndNothing: Senior | Next Rank: 100 Posts; Posts: 59; Joined: Fri Sep 14, 2007 10:35 am; Thanked: 1 times

by beingAndNothing » Mon Dec 24, 2007 5:45 pm

2^(x-2) * 3 = 3*2^13

x-2 = 13
x=15.

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