Math Help

Discussion in 'Community Discussion' started by mgargan1, Oct 22, 2006.

  1. mgargan1 macrumors 65816

    mgargan1

    Joined:
    Feb 22, 2003
    Location:
    Reston, VA
    #1
    My little brother needs help in 8th grade algebra, and it's been a while for me...

    Here is the question:
    Find a number that is 38 less than it's opposite.

    Would that be x= -|x|-38

    Thanks!
     
  2. Shaun.P macrumors 68000

    Shaun.P

    Joined:
    Jul 14, 2003
    Location:
    Omicron Persei 8
    #2
    It worries me that I'm in my 2nd year of a maths degree and can't do this question... :rolleyes:
     
  3. zap2 macrumors 604

    zap2

    Joined:
    Mar 8, 2005
    Location:
    Washington D.C
    #3
    No solution..that always the answer when I don't know!
     
  4. twistedlegato macrumors 65816

    twistedlegato

    Joined:
    Jun 15, 2006
    #4
    umm!


    x= -|x|-38


    the | | means find the absolute value, and x is in the center so fin the absolute value of x but since it has a negitive sighn out of the absolute value symbol.

    Maybe that would help him! Good luck!


    Almost have the answere!
     
  5. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #5
    I think it's just:

    -x - 38 = x

    so, x = -19

    Which makes sense. -19 is 38 less than its opposite, +19.
     
  6. psychofreak Retired

    psychofreak

    Joined:
    May 16, 2006
    Location:
    London
    #6
    The answer is -19

    Edit: AAH...you got there first
     
  7. twistedlegato macrumors 65816

    twistedlegato

    Joined:
    Jun 15, 2006
    #7
    ANSWERE!!!!!!!



    x=-19


    And im only in 7th grade:)
     
  8. amateurmacfreak macrumors 6502a

    amateurmacfreak

    Joined:
    Sep 8, 2005
    #8
    Yep.

    x=-x-38

    Which would be x=-19.

    Like everyone else has said. :)
     

Share This Page