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anonymous

  • 5 years ago

solve for x and y |x y| minus |-y x| |-y x| |x y | equals |4 6| |-4 6| does anyone know how to do this?

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  1. myininaya
    • 5 years ago
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    ok so you have x+y=4, y-x=6, -y-x=-4, x-y=6 correct?

  2. anonymous
    • 5 years ago
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    right

  3. anonymous
    • 5 years ago
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    Its a matrix problem

  4. myininaya
    • 5 years ago
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    x+y=4 => y=4-x, then (4-x)-x=6 4-2x=6 => -2x=6/4=3/2 => x=-3/4 so y=4-x=4-(-3/4)=4+3/4=16/4+3/4=19/4

  5. anonymous
    • 5 years ago
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    im a little confused

  6. myininaya
    • 5 years ago
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    what bothers you?

  7. anonymous
    • 5 years ago
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    explain to me where the 2 came from? was it when you added the 2 ys and xs of the matrix?

  8. myininaya
    • 5 years ago
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    ok i took the first equation and solved it for y and then I wrote the second equation in terms of x so i only had one unknown in this equation

  9. anonymous
    • 5 years ago
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    ok

  10. anonymous
    • 5 years ago
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    aw i see. thanks for your help!

  11. myininaya
    • 5 years ago
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    one sec okay?

  12. myininaya
    • 5 years ago
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    dont leave I have something for you

  13. myininaya
    • 5 years ago
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    I made a mistake. Click on this attachment,

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  14. anonymous
    • 5 years ago
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    ok

  15. anonymous
    • 5 years ago
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    so x =-1. I didnt see what y equaled.

  16. myininaya
    • 5 years ago
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    you don't see y=4-(-1)=4+1=5

  17. anonymous
    • 5 years ago
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    ok i see it so y=5

  18. myininaya
    • 5 years ago
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    lol i ran out of room to put it on one line

  19. anonymous
    • 5 years ago
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    Thats ok i really appreciate your help. THANK YOU!

  20. myininaya
    • 5 years ago
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    np

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