Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

(2) t - x = 5 --> \(\frac{2t + (t - x)}{(t - x)}=\frac{2t + 5}{5}\) --> different values of t will give different values ofr this expression. Not sufficient.

Re: What is the value of (2t + t - x)/(t - x)? [#permalink]

Show Tags

19 Aug 2014, 19:30

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: What is the value of (2t + t - x)/(t - x)? [#permalink]

Show Tags

04 Feb 2016, 22:30

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: What is the value of (2t + t - x)/(t - x)? [#permalink]

Show Tags

06 Feb 2016, 12:56

Walkabout wrote:

What is the value of (2t + t - x)/(t - x)?

(1) 2t/(t - x) = 3

(2) t - x = 5

Statement 1. Multiply both sides by (t-x) ==> 2t=3t-3x Hence t=3x Plug in original equation to get (6x+9x-x)/2x = 7 Statement 2. x=t-5 Plug in original expression to get (2t-5)/5 Clearly not sufficient
_________________

hi, you are to find the value of an equation which consists of two variables... when nothing is given, you cannot assume one value to be some integer and work for second... If there was a statement given that t=3, what would you do then.. someone can take values of both t and x and will not require any statement.. The main point is that you cannot do it this way.. _________________

This is the beauty of DS questions. You are assuming the very thing that you need to show is sufficient. To evaluate options in a DS question, you need to be absolutely sure that you get a unique value for the question asked. In this case, statement 1 clearly is sufficient as you can see in the solutions posted above.

Question for you. How do you know that 't' is the ONLY variable ? I can assume both t and x to be constants while at the same time someone else can assume both of these or one of these to be constants. This is the very reason why you can not assume values in a DS question if it is not mentioned clearly in the question or the given statements.

FYI, t=5 and x=2 also satisfy the given conditions.

Your approach might have worked in a PS question but do not adopt this strategy for DS questions.
_________________

Re: What is the value of (2t + t - x)/(t - x)? [#permalink]

Show Tags

21 Jul 2016, 15:46

1

This post received KUDOS

Top Contributor

Walkabout wrote:

What is the value of (2t + t - x)/(t - x)?

(1) 2t/(t - x) = 3

(2) t - x = 5

Target question:What is the value of (2t + t - x)/(t - x)? This is a good candidate for REPHRASING the target questions. We'll use the fact that (a + b)/c = a/c + b/c Likewise, (2t + t - x)/(t - x) = 2t/(t - x) + (t - x)/(t - x) = 2t/(t - x) + 1 At this point, we can see that we really just need to find the value of 2t/(t - x) REPHRASED target question:What is the value of 2t/(t - x)?

Statement 1: 2t/(t - x) = 3 Perfect! This is EXACTLY the information we need! Since we can answer the REPHRASED target question with certainty, statement 1 is SUFFICIENT

Statement 2: t - x = 5 There are several values of t and x that satisfy statement 2. Here are two: Case a: t = 5 and x= 0, in which case 2t/(t - x) = 5 Case b: t = 6 and x= 1, in which case 2t/(t - x) = 12/5 Since we cannot answer the REPHRASED target question with certainty, statement 2 is NOT SUFFICIENT

After days of waiting, sharing the tension with other applicants in forums, coming up with different theories about invites patterns, and, overall, refreshing my inbox every five minutes to...

I was totally freaking out. Apparently, most of the HBS invites were already sent and I didn’t get one. However, there are still some to come out on...

In early 2012, when I was working as a biomedical researcher at the National Institutes of Health , I decided that I wanted to get an MBA and make the...