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If y[(3x-5)/2] = (OG2016)

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boomgoesthegmat Senior | Next Rank: 100 Posts Default Avatar
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If y[(3x-5)/2] = (OG2016)

Post Fri May 06, 2016 12:32 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If y[(3x-5)/2] = y and y does not equal 0, then x =

    A) 2/3
    B) 5/3
    C) 7/3
    D) 1
    E) 4

    OA: C

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Fri May 06, 2016 12:51 pm
    boomgoesthegmat wrote:
    If y[(3x-5)/2] = y and y does not equal 0, then x =

    A) 2/3
    B) 5/3
    C) 7/3
    D) 1
    E) 4
    We can apply a technique I call the Something Method

    Given: y[(3x-5)/2] = y
    We have y(something) = y, so that something must equal 1
    That is, (3x-5)/2 = 1

    If the fraction equals 1, then: 3x - 5 = 2
    Add 5 to both sides to get: 3x = 7
    Solve: x = 7/3

    Answer: C

    For more on the Something Method, watch this video: https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/video/988

    For extra practice, try this question: https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/video/989

    Cheers,
    Brent

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