Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

krissywatts

  • 3 years ago

solve system of equation: x+y=-1 y-z=4 2x+y+5z=-38

  • This Question is Closed
  1. cyber405
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You can use y-4=z instead of z in the third equation... Do you know rest of the solution...?

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

    plug it into your calculator!

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

    i got 13,-14, and 10 or -10 and something still not adding up right

  4. cyber405
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What's the problem...?

  5. cyber405
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    y - z = 4 ---> z = y - 4 x + y = -1 ---> x = -y-1 then plug these into third one... 2x + y + 5z = -38 ----> 2(-y-1) + y + 5(y-4) = -38 .... -2y-2+y+5y-20=-38 ----> 4y=16 y=... then plug y in other equations to find x and z...

  6. 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