If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

by **I_need_a_700plus** Mon Sep 16, 2013 5:59 pm

The following problem can be found in GMAT Prep. My apologies if this problem is already listed in the forum.

If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

a) 9
b) 11
c) 13
d) 15 (correct answer)
e) 17

Can someone explain this? Many thanks!

by **RonPurewal** Tue Sep 17, 2013 6:33 am

post16795.html#p16795

by **RonPurewal** Tue Sep 17, 2013 6:34 am

I'm going to lock this thread, so we don't get tons of threads about the same problem. If you have further questions, please post them on the thread I linked above.
Thanks.

by **RonPurewal** Tue Sep 17, 2013 6:35 am

By the way, you can quite easily find existing threads by just going to google and typing "site:manhattangmat.com", followed by the exact question you wrote here.

I literally cut and pasted it and boom! two seconds.

If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

Re: If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

Re: If 2^x - 2^(x-2) = 3(2^13), what is the value of x?

Re: If 2^x - 2^(x-2) = 3(2^13), what is the value of x?