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AonZ Group Title

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

  • one year ago
  • one year ago

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  1. AonZ Group Title
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    I know how to solve 2 simutaneous equations but no idea about 3

    • one year ago
  2. AonZ Group Title
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    i rather the elimination method :P

    • one year ago
  3. hartnn Group Title
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    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 ?

    • one year ago
  4. AonZ Group Title
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    3x-4y=13

    • one year ago
  5. AonZ Group Title
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    i just need the steps in which to complete it i think

    • one year ago
  6. hartnn Group Title
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    now multiply 1st equation by 2

    • one year ago
  7. AonZ Group Title
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    6x-8y=26

    • one year ago
  8. hartnn Group Title
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    :O how ?

    • one year ago
  9. AonZ Group Title
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    2x-10y-2z=26

    • one year ago
  10. hartnn Group Title
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    now add it with 3rd equation.....

    • one year ago
  11. AonZ Group Title
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    -x-9y=37 Btw does it matter if you add the 2nd to the 3rd eqution instead of 1st to 3rd?

    • one year ago
  12. hartnn Group Title
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    if you add 2nd and 3rd equation, you could not have eliminated 'z'

    • one year ago
  13. hartnn Group Title
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    now can you find 'x' and 'y' ?

    • one year ago
  14. AonZ Group Title
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    y=-4?

    • one year ago
  15. AonZ Group Title
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    x=-1

    • one year ago
  16. hartnn Group Title
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    yes.

    • one year ago
  17. hartnn Group Title
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    now can u find z ?

    • one year ago
  18. AonZ Group Title
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    mhm... I sub x and y into the 1,2,3 equation?

    • one year ago
  19. AonZ Group Title
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    ok z =6 thank you

    • one year ago
  20. hartnn Group Title
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    yes, correct :) ask if any doubts.

    • one year ago
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