A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve the following system of equations. 3x +1/4y =-3/4 -1/2x+1/3y=8

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @TorilovesVampires

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

    are you sure you typed out those equations correctly? they look somewhat odd to me

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

    ok, much better. we can start by multiplying the second equation by 6

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

    -3x+2y=48

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

    good, now we have: 3x + (1/4)y = (-3/4) -3x + 2y = 48 now add the two equations together

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

    x+2.25y=47.25

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

    don't think I'm supposed to have decimals

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

    @Vocaloid

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

    almost 3x - 3x = ?

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

    I know this one :)

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

    x

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

    nope, not quite hint: 3 - 3 = 0 3x - 3x = ?

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

    0x

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

    There is no such thing as 0x That would be just 0...

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

    good, and 0x = 0 because 0 times anything is 0 so now we have: 2.25y = 47.25 y = ?

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

    21

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

    2.25y is saying 2.25 times y. Negate that by dividing. Divide both sides by 2.25

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

    i did that

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

    y= 21

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

    what about solving for X

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

    ok, now we know that y = 21 we can solve for x by plugging in y = 21 back into one of the other equations

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

    for both equations

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

    -(1/2)x + (1/3)y = 8 -(1/2)x + (1/3)21 = 8 -(1/2)x + 7 = 8 x = ?

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

    we only need to plug in y = 21 into one of the equations, since both will give us the same x value

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

    .5

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

    1/2

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

    nope, not quite (-1/2)x + 7 = 8 subtract 7 from each side to get (-1/2)x = 1 x = ?

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

    -.5

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

    nope, check your math again

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

    1/(-1/2) = ?

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

    -2

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

    good, so x = -2 and y = 21

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

    thanks!

  34. 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

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.