3y=4x

Whitney Garner: GMAT Instructor; Posts: 273; Joined: Tue Sep 21, 2010 5:37 am; Location: Raleigh, NC; Thanked: 154 times; Followed by:74 members; GMAT Score:770

by Whitney Garner » Sun Oct 14, 2012 6:06 pm

humpback wrote:if x=5 in the equation 3y=4x, y is how much greater then x

Hi humpback!

If x = 5, we just substitute this into the other equation...

3y = 4(5)
3y = 20
y = 20/3.

So how much greater is y than x just translates to y-x = ?

20/3 - 5 = 20/3 - 15/3 = [spoiler]5/3[/spoiler].

Hope this helps!

Whit

Whitney Garner
GMAT Instructor & Instructor Developer
Manhattan Prep

Contributor to Beat The GMAT!

Math is a lot like love - a simple idea that can easily get complicated

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