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22 Nov 2009, 17:45
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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They're not too hard, but I can't seem to solve correctly.
A) Solve for P2
E = A1P1 + A2P2 + A3P3
I get P2 = -E + A1P1 + A3P3/-A2
B) Solve the equation
abs. value (\(\frac{x-4}{3}\)) + 2 = 4
I start w/two equations:
\(\frac{x-4}{3}\) + 2 = 4
\(\frac{-x+4}{-3}\) + 2 = 4
I get 10 = x in both equations.
A) Solve for P2
E = A1P1 + A2P2 + A3P3
I get P2 = -E + A1P1 + A3P3/-A2
B) Solve the equation
abs. value (\(\frac{x-4}{3}\)) + 2 = 4
I start w/two equations:
\(\frac{x-4}{3}\) + 2 = 4
\(\frac{-x+4}{-3}\) + 2 = 4
I get 10 = x in both equations.
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22 Nov 2009, 19:23
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ggarr
I Did not get this one.
ggarr
The second one: (4-x)/3 + 2 = 4
Multiply only numerator not denominator by -ve.
\(\frac{x-4}{3}\) and \(\frac{-x+4}{-3}\) are same.
23 Nov 2009, 01:13
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In A, you are moving variables incorrectly.
With this one: \(|\frac{x-4}{3}| + 2 = 4\) you do need to separate it into 2 equations, but I think this is where you made the mistake.
We have to simplify it first
\(|\frac{x-4}{3}| + 2 = 4\)
-2 from both sides
\(|\frac{x-4}{3}| = 2\)
now separate into 2 equations
\(\frac{x-4}{3} = 2\) and \(\frac{x-4}{3} = -2\)
First you get
\(x-4 = 6\); therefore x = 10
and \(x-4=-6\) +4 to both sides means x = -2
So the two answers for x are 10 and -2
These questions are not very detailed and are not like the real GMAT questions. Is each question posted in the same way you found it? If there is more context, please post that. Also, please state the source of the question when posting it.
Quote:
With this one: \(|\frac{x-4}{3}| + 2 = 4\) you do need to separate it into 2 equations, but I think this is where you made the mistake.
We have to simplify it first
\(|\frac{x-4}{3}| + 2 = 4\)
-2 from both sides
\(|\frac{x-4}{3}| = 2\)
now separate into 2 equations
\(\frac{x-4}{3} = 2\) and \(\frac{x-4}{3} = -2\)
First you get
\(x-4 = 6\); therefore x = 10
and \(x-4=-6\) +4 to both sides means x = -2
So the two answers for x are 10 and -2
These questions are not very detailed and are not like the real GMAT questions. Is each question posted in the same way you found it? If there is more context, please post that. Also, please state the source of the question when posting it.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
