A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

please someone help me solve this equation step by step solve by elimination 5x+2y=-7 7x-3y=11

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

    1st multiply the top equation by 3 and the bottom by 2 to be able to eliminate the y components

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

    5x + 2y = -7 |x3| --> 15x+6y = -21 7x - 3y = 11 |x2| --> 14x-6y=22 you got x, then search for y

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

    what she said ha

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

    Do you understand?

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

    after multiplying by 3 and 2 i add the 2 equations together to get x right

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

    1/29?

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

    yes thats correct for x now plug that back into one of the equations to solve for y

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

    ok this is where i keep getting stuck i can not for the life of me figure out how to do that

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

    what numbers do i multiply or whatever im suppose to do

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

    5x+2y=-7 change x with 1/29

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

    5(1/29) + 2y = -7 2y = -7 - (5/29) So. y = [-7-(5/9)] / 2

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

    so then is the answer 70/29

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

    cant be im so confused

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

    no, the answer is x = 1/29 and y = -3.59

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

    thats where i keep getting stuck, how u got that for y, will u put it in laimens terms

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

    5(1/29) + 2y = -7 2y = -7 - (5/29) So. y = [-7-(5/9)] / 2 --> = -3.59

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

    just follow what I did there and you should get it

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

    5(1/29) + 2y = -7 --> 5/29 +2y=-7 2y = -7 - (5/29) 2y = (-203-5)/29 2y = -208/29 y = -208/29 * 1/2 y = -104/29

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

    ok, but im still confused i am really really bad when it comes to this type of math it helps me to make notes how did you get the -203? i need explanations for every answer except the obvious ones

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

    make -7 in a fraction with denominator is 29, 29*-7=-203

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

    ok and then u subtract -5 from that

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

    okay I will walk you through it: So we have x= 1/29 now you know how we got that so plug 1/29 into 5x + 2y = -7 This becomes 5(1/29) + 2y = -7 -----> 5(1/29) = 5/29 So, subtract 5/29 from both sides: 2y = -7 - (5/29) -------Evaluate that Then divide by 2: Then y = [-7-(5/29)] / 2 and y = -3.59 So x = 1/29 and y = -3.59

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

    the solution is (1/29,-104/29)

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

    -104/29 is a fraction form from -3.59

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

    yeah you can leave it in fraction form its more accurate, I just evaluated it

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

    ok ty so much for you guys help and the trouble it took, thank you for being patient with me

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

    hehe not a problem

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

    no problem glad we could help!

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

    tina, you understood the procedure, right?

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

    I am seeing her on this place through out the day. Is something wrong Ms Holman

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

    need help solving this equation step by step soybean meal is 18% protein, cornmeal is 9% protein how many lbs of each should be mixed together to get 360lb mixture that is 15%

  32. 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.