Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mariannu

  • 3 years ago

Solve the linear system using elimination. Hello you guys. I just want to know how you flip it. 2x - y= -11 y = -2x -13

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

    rewrite the second equation by adding 2x to both sides.

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

    for the second equation \[y=-2x-13\] you already solved for y. plug that y into the first equation, giving you\[2x-(-2x-13)=-11\]

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

    Don't get it.

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

    :p

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

    So chrismoon, you are instructing the asker to ignore the directions which say to solve using elimination?????

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

    ALl I just want to know is just how to flip it. and thats it.

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

    @mariannu Do what I said and then add the two equations to eliminate y from the system

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

    What do you mean by flip it?

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

    So its y + 2x = -11???

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

    |dw:1361938190124:dw|

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

    Ok that makes more sense thank you! ^.^ for the help. So I just do that for other equations like that right?

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

    Do you mean other systems?

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

    If so, the answer is yes.

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

    Ok, thank you much!!! ^.^ lol

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

    yw

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

    You're given two things: Equation 1)\[2x-y=-11\]Equation 2) \[y=-2x-13\] Equation 2 tells you what y is already. You can put what y equals (-2x-13 in this case) into the first equation for y. Equation 1 goes from \[2x-y=-11\] to \[2x-(-2x-13)=-11\] since\[y=-2x-13\] Simplify your Equation 1 from \[2x-(-2x-13)=-11\] to \[2x+2x+13=-11\]giving you \[4x=-24\] divide both sides by 4 to solve for x \[x=-6\] Now that you have solved for x, go all the way back to the original Equation 2\[y=-2x-13\] Since we know what x is now, plug it in\[y=-2(-6)-13\]giving us \[y=-1\] There you have it: \[y=-1\]and \[x=-6\]

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

    @chrismoon Why do you keep telling the asker to ignore the directions given?

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

    Sorry, didn't see you guys already talked about it before I posted. Didn't get notified you guys got it taken care of.

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

    @chrismoon The problem says to solve by elimination. You keep telling the asker to use substitution.

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

    Guess I didn't read the question very thoroughly. My bad.

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

    That is ok. As you try to help. but thanks

  22. 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