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n1995 Group Title

To solve this system using the addition method, you would need to multiply the first equation by what number in order for the y's to add out? 3x - y = 3 -2x + 2y = 6

  • 2 years ago
  • 2 years ago

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  1. joshi Group Title
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    well you need the same coefficient for y if you want them to cancel. in the first one the coefficient of y is -1. and in the second it's 2. so -1 x ? = 2

    • 2 years ago
  2. n1995 Group Title
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    -1 x -1 = 2 ?

    • 2 years ago
  3. radar Group Title
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    You would the first equation by 2, getting 6x -2y = 6. when added to second equation the y's would "add out" or their sum is 0.

    • 2 years ago
  4. radar Group Title
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    I left out the word multiply, which goes in the first sentence between " would * the"

    • 2 years ago
  5. n1995 Group Title
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    so what would you multiply the eqaution by?

    • 2 years ago
  6. Dido525 Group Title
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    @hero. Don't just post the answer next time unless you absolutely need to...

    • 2 years ago
  7. Hero Group Title
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    I thought I was checking someone's answer. @Falkqwer misled me

    • 2 years ago
  8. Dido525 Group Title
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    Ohh...

    • 2 years ago
  9. Falkqwer Group Title
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    Yes he did :)

    • 2 years ago
  10. Falkqwer Group Title
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    lol I did

    • 2 years ago
  11. radar Group Title
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    As I have previously posted, if you want to eliminate the y's, multiply the first equation by 2. this gives you: 6x -2y = 6 Now add the 2nd equation -2x+2y =6 --------------- 4x = 12 x=3

    • 2 years ago
  12. radar Group Title
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    Now you can solve for y.

    • 2 years ago
  13. Hero Group Title
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    There can only be one right answer

    • 2 years ago
  14. Falkqwer Group Title
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    @radar is right cause your supposed to Solve it using the addition method.

    • 2 years ago
  15. radar Group Title
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    Substituting for x in the 2nd equation getting -2(3) + 2y = 6 -6 +2y = 6 2y= 12 y=6 x=3, y=6 To be sure check them out

    • 2 years ago
  16. Hero Group Title
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    I found my mistake. Wha ta shame

    • 2 years ago
  17. radar Group Title
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    Do we need to verify? Did you get (3,6) @Hero

    • 2 years ago
  18. Hero Group Title
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    @radar, what is it about "I found my MISTAKE" did you not understand?

    • 2 years ago
  19. radar Group Title
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    It never hurts to verify substituting 3 for x, 6 for y 3x-y=3 or 3(3)-6=3 9-6=3 3=3 first one checks! -2x+2y=6 -2(3)+2(6)=6 -6 +12 = 6 6=6 checks

    • 2 years ago
  20. Hero Group Title
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    No need to persist. Be happy that you provided the right solution and move on.

    • 2 years ago
  21. radar Group Title
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    @Hero, just wanted to verify my answer, so I was simply asking if you got the same (after your error discovery.

    • 2 years ago
  22. Hero Group Title
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    When I said I found my mistake, that implies that I acknowledge your correct answer. Furthermore I gave you a medal. As I said, no need to persist beyond that.

    • 2 years ago
  23. radar Group Title
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    Thanks @Hero

    • 2 years ago
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