Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

airrbae

What is the solution for this system of linear equations? please explain!! y=x-8 y=8x-71

  • one year ago
  • one year ago

  • This Question is Closed
  1. yoyointegrals
    Best Response
    You've already chosen the best response.
    Medals 0

    set them equal to eachother, you will end up with x-8 = 8x -71, solve for x

    • one year ago
  2. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    then what do you do? im confused?

    • one year ago
  3. yoyointegrals
    Best Response
    You've already chosen the best response.
    Medals 0

    start by adding 71 to both sides

    • one year ago
  4. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    x=63?

    • one year ago
  5. yoyointegrals
    Best Response
    You've already chosen the best response.
    Medals 0

    close, divide by the coefficient of the x

    • one year ago
  6. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    whats the coefficient?

    • one year ago
  7. yoyointegrals
    Best Response
    You've already chosen the best response.
    Medals 0

    7

    • one year ago
  8. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    so I have 8x-71=1x=8 explain to me what I do from here? I subtract 71 from both sides here?

    • one year ago
  9. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    i would start by subtracting \(x\) from both sides, to put all the terms with \(x\) on the left

    • one year ago
  10. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    in other words get \(7x-71=-8\)

    • one year ago
  11. electrokid
    Best Response
    You've already chosen the best response.
    Medals 0

    solution of a set of equation means |dw:1364000497143:dw| find the point P(x,y) which satisfies all the equations.

    • one year ago
  12. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    then add 71 to both sides to get \[7x=63\] and finally divide both sides by \&\)

    • one year ago
  13. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    that, is , finally divide both sides by \(7\)

    • one year ago
  14. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    so the answer for x=9?

    • one year ago
  15. yoyointegrals
    Best Response
    You've already chosen the best response.
    Medals 0

    correct.

    • one year ago
  16. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    so how would I find y now since I know x?

    • one year ago
  17. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    you replace \(x\) by \(9\) in either equation

    • one year ago
  18. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    wait, is y=1?

    • one year ago
  19. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    yes

    • one year ago
  20. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    \[y=x-8\] \[y=9-8=1\]

    • one year ago
  21. airrbae
    Best Response
    You've already chosen the best response.
    Medals 0

    omg thank you so much! you're amazing!

    • one year ago
  22. krissywatts
    Best Response
    You've already chosen the best response.
    Medals 0

    set them side by side like this: x-8=8x-71 subtract -8 on both sides and add 8 to both sides now you should get -7x=-63

    • one year ago
  23. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    yw (if you meant me, if not, then yw from everyone )

    • one year ago
  24. krissywatts
    Best Response
    You've already chosen the best response.
    Medals 0

    now plug byour answer back into the first equation to get y

    • one year ago
    • Attachments:

See more questions >>>

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.