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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

  • one year ago
  • one year 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

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

    • one year 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.

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

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

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

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

    • one year ago
  8. Dido525 Group Title
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    Ohh...

    • one year ago
  9. Falkqwer Group Title
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    Yes he did :)

    • one year ago
  10. Falkqwer Group Title
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    lol I did

    • one year 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

    • one year ago
  12. radar Group Title
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    Now you can solve for y.

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

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

    • one year 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

    • one year ago
  16. Hero Group Title
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    I found my mistake. Wha ta shame

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

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

    • one year 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

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

    • one year 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.

    • one year 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.

    • one year ago
  23. radar Group Title
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    Thanks @Hero

    • one year ago
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