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Easy Math equation

Discussion in 'Off-Topic' started by PROXY, Feb 6, 2011.

  1. PROXY

    PROXY

    3D Modeling Reviewer

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    Okay, here is my problem:

    Today, Mr. A, is 4x older than his son Lukas. 2 Years ago, he was 6x older as his son 3 years ago.

    How old is Lukas?

    If anyone can make it for me, I would be very glad. I'm somewhat having some problems ^^ +rep for help :)
     
  2. Argus

    Argus

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    Lukas is 8 years old I belive.

    x=4y
    x-2=6(y-3)
    4y-2=6(y-3)
    4y-2=6y-18
    4y+16=6y
    2y=16
    y=8
     
  3. The_wand_mirror

    The_wand_mirror

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    is that even a sentence.
     
  4. Chizume

    Chizume

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    I'm thinking Lukas is 8 years old.

    If he was 8 years old Mr. A would be 30 when he was 5.
    Then, today Mr. A is his son's age times four, which means he would be 32 and two years ago he was 30.

    Right?
     
  5. Kuvion

    Kuvion

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    My equations:
    With A being Mr. A's age and L being the age of Lukas

    A = 4*L

    A-2 = 6*(L-3)
    A = 6*(L-3)+2

    4*L = 6*(L-3)+2
    4*L = 6*L-18+2
    2*L = 3*L-8
    L = 8

    8 is correct
     
  6. DonDustin

    DonDustin

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    it should be:
    x=4y
    x-2=6(y-5)
    if I understand the last part correctly.

    I just made it via testing and found out that the man is 56 and Lukas is 14.

    Proof:

    56=4x14
    56-2=6(14-5)
    ->54=6x9

    Edit: ok it just seems that I understood this task a bit wrong :p
     
    Last edited: Feb 6, 2011
  7. The_wand_mirror

    The_wand_mirror

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    how can "2 Years ago, he was 6x older as his son 3 years ago" not be a mindfuck to you guys? :s
     
  8. MySpaceBarBroke

    MySpaceBarBroke

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    Uh, logic?


    Don't do drugs, kids.
     
  9. The_wand_mirror

    The_wand_mirror

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    Well it really doesn't make any fucking sense to me lol.

    "There is a car there but it's not there where it is because it's there where it's not" makes more sense.

    But english is not my main language so... muh?
     
  10. Raven0

    Raven0

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    :thumbs_up: THAT'S THE POWER OF MATH KIDS!
     
  11. Coolty44

    Coolty44

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    math =/= English
     
  12. fladdermasken

    fladdermasken

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    Power of Logic
    [​IMG]
     
  13. PROXY

    PROXY

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    didn't expect so many posts ^^

    anyway, thank you all for your help and... assistant :p
    I suppose, it's solved now. Thanks again :)
     
  14. Chizume

    Chizume

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    I should post my math homework :p
     
  15. fladdermasken

    fladdermasken

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    I was sort of thinking in those lines myself :3
     
  16. Devine

    Devine

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    x=4y
    x².3.14= z
    z+1/2= y
    => x= 8