solve the equation!

Geva@EconomistGMAT: GMAT Instructor; Posts: 905; Joined: Sun Sep 12, 2010 1:38 am; Thanked: 378 times; Followed by:123 members; GMAT Score:760

by Geva@EconomistGMAT » Mon Aug 22, 2011 11:53 pm

marmar29 wrote:the answer of 6n-4n=4n is
a)0
b)1
c)2
d)3
e)4
im stuck !
pls help
thanks!

Not that you're likely to see anything like this on the test, but don't let a weird equation psyche you out. Do what you always do: isolate the ns on one side using the basic operators of addition, subtraction, multiplication, division on both sides of the equation.

6n-4n=4n /-4n (to move the 4n from the right to the left)
6n-4n-4n = 4n-4n
-2n=0 /:-2
n=0
Answer is A.

Geva
Senior Instructor
Master GMAT
1-888-780-GMAT
https://www.mastergmat.com

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