Welcome! Check out our free B-School Guides to learn how you compare with other applicants.
Login or Register
 

Simple maths question help

This topic has 2 member replies
Bookmark
Previous Topic Next Topic
GMAT? Rising GMAT Star Default Avatar
Joined
29 Sep 2006
Posted:
46 messages
Simple maths question help Post Thu Dec 21, 2006 9:15 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    In a weight lifting competition, the total weight of Joe's two lifts was 750 pounds. If twice the wieght of his first lift was 300 pounds more than the weight of his second lift. What was the weight of his first lift?

    Let A be the weight of his first lift:

    2A + A + 300 = 750

    3A = 1050

    A = 350......which is the right answer but I'm unsure whether my working out is correct.

    Thanks all.

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    thankont Rising GMAT Star
    Joined
    15 Dec 2006
    Posted:
    41 messages
    Followed by:
    1 members
    Post Thu Dec 21, 2006 10:56 am
    A --> 1st. B--> 2nd.
    A+B=750
    2A=300+B => B=2A-300 subst. into first eqn. so we have
    A+2A-300=750 => A=350

    bluestocking Just gettin' started! Default Avatar
    Joined
    29 Dec 2006
    Posted:
    7 messages
    Post Sat Dec 30, 2006 2:05 pm
    alternatively

    x = first lift
    750 - x = second lift

    therefore
    2x = (750-x) + 300
    2x + x = 750 + 300 ----> 3x = 1050

    x = 350

    helpful hint : try to work with as few variables as possible.

    Best Conversation Starters
    1 varun289 38 topics
    2 killerdrummer 22 topics
    3 sana.noor 20 topics
    4 sanaa.rizwan 14 topics
    5 guerrero 14 topics
    See More Top Beat The GMAT Members...

    Most Active Experts
    1 image description Brent@GMATPrepNow

    GMAT Prep Now Teacher

    		 204 posts
    2 image description GMATGuruNY

    The Princeton Review Teacher

    		 136 posts
    3 image description Jim@StratusPrep

    Stratus Prep

    		 100 posts
    4 image description Anju@Gurome

    Gurome

    		 74 posts
    5 image description Jon@Admissionado

    Admissionado

    		 51 posts
    See More Top Beat The GMAT Experts