Math Question

Discussion in 'Green Room' started by Bman, Mar 7, 2003.

  1. Bman

    Bman OSNN Veteran Original

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    How would you solve this?


    Solve each linear system.

    a) x + y = -8
    x - 2y = 7
     
  2. Bman

    Bman OSNN Veteran Original

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    anybody??????.......
     
  3. Heeter

    Heeter Overclocked Like A Mother

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    The answer is 179,756:):):)
    Can You tell that it's been 17 years since I last left school.



    Heeter
     
  4. Krux

    Krux Nissan Powered

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    why type of math is this? and are u trying to find what x= or what?
     
  5. Geffy

    Geffy Moderator Folding Team

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    if both of those are in the same part of the question ie both as a) then I would say that you do it by simultaneous equations

    x + y = -8 --> leave
    x - 2y = 7 --> multiply by -1

    x + y = -8
    -x + 2y = -7

    add these

    3y = -15 --> y = -5

    x + -5 = 8 --> x = -3
    x - 2(-5) = 7 --> x = -3

    x = -3
    y = -5

    both equations work, so yeah I think this is the right way to do it
     
  6. Geffy

    Geffy Moderator Folding Team

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    Since you last left school?? Why did you go back?
     
  7. dave holbon

    dave holbon Moderator

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    This is not a linear system/equation.
     
  8. Evil Marge

    Evil Marge I Rule Political User

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    18 year for me.....That's a long long time ago :eek:
     
  9. the_music_man

    the_music_man aka prodj88 =P

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    to get that answer you use system of equations. which means multiplying by a certain number to get something in common so they cancel out!
     
  10. Friend of Bill

    Friend of Bill What, me worry?

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    I always left math problems to the math teacher...:D
     
  11. Geffy

    Geffy Moderator Folding Team

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    look at my post above, thats what I did
     
  12. the_music_man

    the_music_man aka prodj88 =P

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  13. dave holbon

    dave holbon Moderator

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    So + two apples and a banana still equals an orange –two apples and a banana then?

    :) :) :)