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Algebra question

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by Brent@GMATPrepNow » Thu Dec 18, 2008 11:45 am
If 3xm + 2ym - 2yn - 3xn = 0 and, m does not equal n, then what is the value of y in terms of x?

A) -2x/3
B) -3x/2
C) 3x^2/2
D) 2x/3
E) 3x/2

Answer: E
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Re: Algebra question

by logitech » Thu Dec 18, 2008 11:56 am
Brent Hanneson wrote:If 3xm + 2ym - 2yn - 3xn = 0 and, m does not equal n, then what is the value of y in terms of x?

A) -2x/3
B) -3x/2
C) 3x^2/2
D) 2x/3
E) 3x/2

Answer: E
If we regroup the terms:

3x(m-n) + 2y(m-n)=0

(3x+2y)(m-n)=0

Since m is not equal to n, 3x+2y=0

and y= -3x/2

So I would choose B
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by mals24 » Thu Dec 18, 2008 11:57 am
agree with logitech even im getting B

3x(m-n) = 2y(n-m)
3x=-2y
Y = -3x/2
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by dmateer25 » Thu Dec 18, 2008 11:58 am
3x(m – n) + 2y(m – n) = 0

3x + 2y = 0
3x = -2y
-3x/2 = y


I too would choose B.
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by Brent@GMATPrepNow » Thu Dec 18, 2008 12:25 pm
Oops, you're entirely correct - the answer is B.
Looks like I can't even solve my own questions :oops:
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