Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

mskyeg

  • 2 years ago

What is the solution of the system of equations?

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

  2. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    what have u tried ? tried elimination method ?

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

    subtract eq. 1 from eq. 3, what u get ?

  4. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    z=-3

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

    that is correct! need further help? because its just now 2 variables to solve and u will have 3 equations for it...

  6. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oncause this is where i got stuck when i did it previously

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

    one sec

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

    x=-9/5 - y

  9. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    that u got from 2nd equation, right ? what is 3-4z= ? not -9, i suppose...

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

    ya i got it from the second equation but i just got -5y+5y=24 after plugging it in that would mean that 0=24 which makes no sense

  11. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    can u show your working, so that i may point out the error. and di u understand how x=-9/5 - y is incorrect, it should be x=5-y

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

    *did

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

    5x+5y+4z=3 5x+5y+4(-3)=3 5x+5y-12=3 5x+5y=-9 5x=-9-5y shouldn't that then equal x=-9/5-y because Im dividing both parts by 5???

  14. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    oooooh oops i just realized my error

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

    so did u get x=5-y ?

  16. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    5x+5y+4z=3 5x+5y+4(-3)=3 5x+5y-12=3 5x+5y=15 5x=15-5y x=3-y

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

    oops. u are correct

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

    @mskyeg Would posting the final solutions be satisfactory?

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

    now plug hat in 1st equaion

  20. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    *that

  21. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    3(3-y)+2y+(-3)=7 and u get y

  22. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    y=-1???

  23. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes :)

  24. mskyeg
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thanks so much:)

  25. hartnn
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    welcome ^_^

  26. Not the answer you are looking for?
    Search for more explanations.

    Search OpenStudy
    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.