• NEW! FREE Beat The GMAT Quizzes
Hundreds of Questions Highly Detailed Reporting Expert Explanations
• 7 CATs FREE!
If you earn 100 Forum Points

Engage in the Beat The GMAT forums to earn
100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote ## In the figure above, if m and n are parallel, then x=? tagged by: AAPL ##### This topic has 3 expert replies and 0 member replies ### Top Member ## In the figure above, if m and n are parallel, then x=? In the figure above, if m and n are parallel, then x=? (A) 30 (B) 50 (C) 70 (D) 105 (E) 210 The OA is C. Please, can any expert explain this PS question for me? I have many difficulties to understand why that is the correct answer. Because m is parallel to n we know that x = 2x -30 Now we just solve for x and we get x = 30. Answer should be A, right? Thanks. ### GMAT/MBA Expert GMAT Instructor Joined 08 Dec 2008 Posted: 13042 messages Followed by: 1251 members Upvotes: 5254 GMAT Score: 770 AAPL wrote: In the figure above, if m and n are parallel, then x=? (A) 30 (B) 50 (C) 70 (D) 105 (E) 210 The OA is C. Please, can any expert explain this PS question for me? I have many difficulties to understand why that is the correct answer. Because m is parallel to n we know that x = 2x -30 Now we just solve for x and we get x = 30. Answer should be A, right? Thanks. You are correct; the answer SHOULD be A (since we know that x = 2x - 30, and the solution is x = 30) What's the source of this question? Cheers, Brent _________________ Brent Hanneson â€“ Creator of GMATPrepNow.com Use my video course along with Sign up for free Question of the Day emails And check out all of these free resources GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMATâ€™s FREE 60-Day Study Guide and reach your target score in 2 months! ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 AAPL wrote: In the figure above, if m and n are parallel, then x=? (A) 30 (B) 50 (C) 70 (D) 105 (E) 210 The OA is C. Please, can any expert explain this PS question for me? I have many difficulties to understand why that is the correct answer. Because m is parallel to n we know that x = 2x -30 Now we just solve for x and we get x = 30. Answer should be A, right? Thanks. Hi AAPL, Let's take a look at your question. Lines m and n are parallel. The angles x and (2x - 30) are called corresponding angles. When two parallel lines are cut by another line then the corresponding angles formed are always congruent. Therefore, x = 2x - 30 2x - x = 30 x = 30 Therefore, Option A is correct. Hope its helps. I am available if you'd like any follow up. _________________ GMAT Prep From The Economist We offer 70+ point score improvement money back guarantee. Our average student improves 98 points. Free 7-Day Test Prep with Economist GMAT Tutor - Receive free access to the top-rated GMAT prep course including a 1-on-1 strategy session, 2 full-length tests, and 5 ask-a-tutor messages. Get started now. ### GMAT/MBA Expert GMAT Instructor Joined 04 Oct 2017 Posted: 551 messages Followed by: 11 members Upvotes: 180 AAPL wrote: In the figure above, if m and n are parallel, then x=? (A) 30 (B) 50 (C) 70 (D) 105 (E) 210 The OA is C. Please, can any expert explain this PS question for me? I have many difficulties to understand why that is the correct answer. Because m is parallel to n we know that x = 2x -30 Now we just solve for x and we get x = 30. Answer should be A, right? Thanks. Hi AAPL, Let's take a look at your question. Lines m and n are parallel. The angles x and (2x - 30) are called corresponding angles. When two parallel lines are cut by another line then the corresponding angles formed are always congruent. Therefore, x = 2x - 30 2x - x = 30 x = 30 Therefore, Option A is correct. Hope its helps. I am available if you'd like any follow up. _________________ GMAT Prep From The Economist We offer 70+ point score improvement money back guarantee. Our average student improves 98 points. Free 7-Day Test Prep with Economist GMAT Tutor - Receive free access to the top-rated GMAT prep course including a 1-on-1 strategy session, 2 full-length tests, and 5 ask-a-tutor messages. Get started now. • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep Available with Beat the GMAT members only code • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• FREE GMAT Exam
Know how you'd score today for \$0

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

### Top First Responders*

1 Ian Stewart 44 first replies
2 Brent@GMATPrepNow 33 first replies
3 Scott@TargetTestPrep 32 first replies
4 Jay@ManhattanReview 24 first replies
5 GMATGuruNY 18 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

### Most Active Experts

1 Scott@TargetTestPrep

Target Test Prep

149 posts
2 Max@Math Revolution

Math Revolution

93 posts
3 Ian Stewart

GMATiX Teacher

53 posts
4 Brent@GMATPrepNow

GMAT Prep Now Teacher

50 posts
5 GMATGuruNY

The Princeton Review Teacher

30 posts
See More Top Beat The GMAT Experts