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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 ## x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x tagged by: Max@Math Revolution ##### This topic has 3 expert replies and 0 member replies ### GMAT/MBA Expert ## x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult [GMAT math practice question] x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z? A. 1 B. 2 C. 3 D. 4 E. 5 _________________ Math Revolution Finish GMAT Quant Section with 10 minutes to spare. The one-and-only Worldâ€™s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy. Only$149 for 3 month Online Course
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Max@Math Revolution wrote:
[GMAT math practice question]

x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z?

A. 1
B. 2
C. 3
D. 4
E. 5
GIVEN:
x + 2y + 3z = 4
5x + 4y + 3z = 8

ADD the two equations to get: 6x + 6y + 6z = 12
Factor: 6(x + y + z) = 12
Divide both sides by 6 to get: x + y + z = 2

Cheers,
Brent

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When we add the two equations, we obtain (x+2y+3z) + (5x+4y+3z) = 6(x+y+z) = 4 + 8 = 12. Dividing both sides of this equation by 6 yields x+y+z = 2.

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Only $149 for 3 month Online Course Free Resources-30 day online access & Diagnostic Test Unlimited Access to over 120 free video lessons-try it yourself Email to : info@mathrevolution.com ### GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2950 messages Followed by: 19 members Upvotes: 43 Max@Math Revolution wrote: [GMAT math practice question] x + 2y + 3z = 4 and 5x + 4y + 3z = 8. What is the value of x + y + z? A. 1 B. 2 C. 3 D. 4 E. 5 Adding the equations, we have: 6x + 6y + 6z = 12 Dividing by 6, we have: x + y + z = 2 Answer: B _________________ Scott Woodbury-Stewart Founder and CEO scott@targettestprep.com See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • 5 Day FREE Trial Study Smarter, Not Harder Available with Beat the GMAT members only code • Magoosh Study with Magoosh GMAT prep 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 • 5-Day Free Trial 5-day free, full-access trial TTP Quant Available with Beat the GMAT members only code • 1 Hour Free BEAT THE GMAT EXCLUSIVE 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 • FREE GMAT Exam Know how you'd score today for$0

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