A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Hey guys I need help with Elimination method of 4y+2x=18 3x+6y=26

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

    what do you have to find?

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

    I have to solve using the elimination method.

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

    What you need to do to start with is arrange one of the equations into the form y=... or x=... and then substitute it into the other equation. which one would you like to start with?

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

    So far I know I multiply 3 to the top equation And -2 to the bottom equation

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

    cool, do you know why you do this multiplication?

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

    I have 3*2x+4y=18*3 Equals 6x+4y=54

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

    No ..I don't :/

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

    The point is to eliminate one of the x's or y's from the equation, then it makes it easy to solve it right?

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

    Ok I got you .

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

    You multiply the whole equations so that you get the same number of x or the same number of y on each line, then they can cancel each other out.

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

    so if you multiply the top by 3, you get 12y+6x=54 and the bottom by -2 you get -6x -12y = -52

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

    which is where you were at.. still following?

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

    Ok I know for the 2nd equation they cancel out -2*3x+6y=26*-2 Equals 6x+6y=24y And they cancel out

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

    Wait I'm wrong aren't i..

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

    yeah i'm just trying to follow your math, hold on

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

    this one is tricky because both the x's and y's cancel each other out. are you sure you have it written down right?

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

    Yes question #4

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

    are you sure its elimination? substitution would be much easier

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

    It says "solve using the elimination method"

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

    Are you able to help me ?

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

    it has me stumped. can you show me whole of the question?

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

    it looks like it says substitution up the top

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

    Question # 4

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

    ok, so the way i can see this working if you start back with this: so if you multiply the top by 3, you get 12y+ 6x = 54 and the bottom by -2 you get -6x -12y = -52 you followed up to this point right?

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

    My conclusion is that there is no solution. I'll post my working shortly.

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

    Ok because I am so confused lol

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

    uploaded below. perhaps there is a typo in the question.

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

    Oh wow . Ok , so is that what I tell my instructor ?

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

    do you know how to draw graphs?

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

    Not really .. I'm sorry I'm just now starting to understand this math thing .

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

    You should tell your instructor that you can't solve this using the elimination method. You've talked to some other people who have done university maths, and they can't solve it using the elimination method or the substitution method. When both of these equations are shown on a graph, there is no point where the two lines intersect - so no real values of x and y where both equations are solved. So the equations are ok on their own, but there is no solution.

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

    Ok great , Thank you soo much !! You're awesome ! Helped me a lot

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

    you can have a look at the graphs on dismiss.com, i've also posted the picture showing the two lines don't intersect

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

    screenshot here.

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

    any other time you're trying to check your simultaneous equations, you can write them in and check them here too - its great if you're a visual learner

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

    Yes ! I am actually a visual learner do this will definitely help me .

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

    Do you have time for another question ? Last one

  38. 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.