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Loujoelou

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable y is eliminated in the first and second equations, then the second and third equations. 3x – y + 3z = 1 4x + y – 6z = 3 4x – 2y + 3z = –3 7x – 3z = 4 12x – 9z = 3 7x – 3z = 4 4x – 6z = 3 3x + 3z = 1 12x – 9z = 3 3x + 3z = 1 4x – 6z = 3

  • one year ago
  • one year ago

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  1. ParthKohli
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    I prefer a question at a time. I'd help you with the first.

    • one year ago
  2. ParthKohli
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    Add all equations.

    • one year ago
  3. Loujoelou
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    Lol it is a question, 9ut the last 8 sets are choices.

    • one year ago
  4. Loujoelou
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    4 sets*

    • one year ago
  5. ParthKohli
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    lol

    • one year ago
  6. waterineyes
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    Ha ha ha..

    • one year ago
  7. ParthKohli
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    Start by adding the top two equations.

    • one year ago
  8. waterineyes
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    What do you get?? @Loujoelou

    • one year ago
  9. Loujoelou
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    I know it's either C/D, cause 3x+3z=1 is what you get when you eliminate y from 1st/2nd equation.

    • one year ago
  10. Loujoelou
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    nvm other way around. It's A/B

    • one year ago
  11. Loujoelou
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    Cause you get 7x-3z=4 not what I said earlier.

    • one year ago
  12. ParthKohli
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    Yep.

    • one year ago
  13. ParthKohli
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    Now, you multiply the second equation by 2 and then add equation 1 and 2.

    • one year ago
  14. waterineyes
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    Now multiply second equation by 2 and then add second and third equation and let us see what you get.

    • one year ago
  15. Loujoelou
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    K I get it now :) It's A cause you get 12x-9z=3. Was just a little confused about it.

    • one year ago
  16. ParthKohli
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    Yep! :)

    • one year ago
  17. Loujoelou
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    tyvm @waterineyes @ParthKohli I understand it perfectly now :) At least doing this by elimination method I mean.

    • one year ago
  18. ParthKohli
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    You got the thing successfully. Congratulations, Lou!

    • one year ago
  19. waterineyes
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    You are doing this by elimination only @Loujoelou

    • one year ago
  20. Loujoelou
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    Lol thx @ParthKohli and yes for this problem I had to @waterineyes

    • one year ago
  21. waterineyes
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    Okay..

    • one year ago
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