Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

AonZ

  • 3 years ago

Simutaneosly solve x-5y-z=13 2x+y+z=0 -3x+y+2z=11

  • This Question is Closed
  1. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I know how to solve 2 simutaneous equations but no idea about 3

  2. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i rather the elimination method :P

  3. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ok, so if i help you get 2 equations in x and y only , will you be able to solve the rest ? 1) Add 1st and 2nd equation, what u get ?

  4. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    3x-4y=13

  5. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i just need the steps in which to complete it i think

  6. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now multiply 1st equation by 2

  7. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    6x-8y=26

  8. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    :O how ?

  9. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    2x-10y-2z=26

  10. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now add it with 3rd equation.....

  11. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -x-9y=37 Btw does it matter if you add the 2nd to the 3rd eqution instead of 1st to 3rd?

  12. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    if you add 2nd and 3rd equation, you could not have eliminated 'z'

  13. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now can you find 'x' and 'y' ?

  14. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y=-4?

  15. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    x=-1

  16. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes.

  17. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now can u find z ?

  18. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    mhm... I sub x and y into the 1,2,3 equation?

  19. AonZ
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok z =6 thank you

  20. hartnn
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes, correct :) ask if any doubts.

  21. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy