Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 05:39

### GMAT Club Daily Prep

#### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# if x does not equal zero, 2x=5y and 3z=7x what is the ratio

Author Message
CEO
Joined: 21 Jan 2007
Posts: 2747
Location: New York City
Followers: 11

Kudos [?]: 941 [0], given: 4

if x does not equal zero, 2x=5y and 3z=7x what is the ratio [#permalink]

### Show Tags

23 May 2007, 18:56
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

if x does not equal zero, 2x=5y and 3z=7x what is the ratio of z to y?

2 to 21
3 to 5
14 to 15
6 to 5
35 to 6

2x=5y
3z=7x

we look for a common variable and find a LCM.

7 (2x=5y) ==> 14x=35y
2 (3z=7x) ==> 6z=14x

therefore 14x=6z=35y
the question asks for the ratio of z to y
which is

z/y
6/35
which is 6 to 35
what am i doing wrong here?
Director
Joined: 26 Feb 2006
Posts: 901
Followers: 4

Kudos [?]: 123 [0], given: 0

### Show Tags

23 May 2007, 19:11
bmwhype2 wrote:
if x does not equal zero, 2x=5y and 3z=7x what is the ratio of z to y?

2 to 21
3 to 5
14 to 15
6 to 5
35 to 6

2x=5y
x=5y/2 ...........1

3z=7x
x = 3z/7..............2

5y/2 = 3z/7
z/y = 35/6

E.
Re: PS #7 ratios   [#permalink] 23 May 2007, 19:11
Display posts from previous: Sort by