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raebaby420

  • 2 years ago

PLEASE HELP :3 Solve 2x + 5y = −13 3x − 4y = −8 (4, 1) (−4, 1) (4, −1) (−4, −1)

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  1. raebaby420
    • 2 years ago
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    @Jack1 for ones like these: there is no parenthesis, or exponents, so I staret with the multiplication.. I want to get my y's to one side.. how do I do that? I divide them?

  2. Jack1
    • 2 years ago
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    i like to subtract first to isolate the one term on one side so 2x + 5y = −13 2x = -13 -5y x = -(13/2) - (5/2)y

  3. Jack1
    • 2 years ago
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    or if not, get them both in terms of 6x

  4. Jack1
    • 2 years ago
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    2x + 5y = -13 so 6x + 15y = -39 and 3x - 4y = -8 so 6x - 8y = -16 therefore 6x = -39 - 15y and 6x = -16 + 8y

  5. raebaby420
    • 2 years ago
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    AH I thought so, u do them apart and I knew I took the 5 from that side

  6. Nurali
    • 2 years ago
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    2x + 5y = −13-------(1) 3x − 4y = −8 --------(2) in equation 1 2x=-13-5y x=-13-5y/2 put x in equation 2 3(-13-5y/2)-4y=-8 -39-15y/2-4y=-8 -39-15y-8y=-16 -23y=-16+39 -23y=23 y=-1 put y in equation 1 2x + 5y = −13 2x+5(-1)=-13 2x-5=-13 2x=-13+5 2x=-8 x=-4

  7. Jack1
    • 2 years ago
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    6x = -39 - 15y = -16 + 8y -39 - 15y = -16 + 8y -39 = -16 + 23y -23 = 23y -1 = y

  8. raebaby420
    • 2 years ago
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    I see.

  9. raebaby420
    • 2 years ago
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    The next one I have I have to get the value of y.. is it the same way we get the value of x?

  10. Jack1
    • 2 years ago
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    exactly the same way, it doesn't matter if the term is called x or y or q, its all the same when using simultaneous equations

  11. raebaby420
    • 2 years ago
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    Ok I think I gotcha

  12. raebaby420
    • 2 years ago
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    What is the value of y in the solution to the following system of equations? 5x − 3y = −11 2x − 6y = −14 −1 0 1 2

  13. raebaby420
    • 2 years ago
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    This is what I have. ill let u no what I get

  14. Jack1
    • 2 years ago
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    cools

  15. raebaby420
    • 2 years ago
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    ok so I got

  16. raebaby420
    • 2 years ago
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    5x-3y=-11 +3y ____________ 5x=-11+3y

  17. raebaby420
    • 2 years ago
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    correct?

  18. uri
    • 2 years ago
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    where is +3y coming from?

  19. Jack1
    • 2 years ago
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    yep

  20. Jack1
    • 2 years ago
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    ignore uri, he's a little slow and apparently i hate him ;D

  21. raebaby420
    • 2 years ago
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    Oh..

  22. uri
    • 2 years ago
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    Huh? I'm a girl..and that's not the way to talk.

  23. raebaby420
    • 2 years ago
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    Where do I go from 5x=-11+3y

  24. Jack1
    • 2 years ago
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    sure u are... online anyway an i bet u tell that to all the boys ;P

  25. uri
    • 2 years ago
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    Ah? last time i checked..i was a girl.

  26. Jack1
    • 2 years ago
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    double it change it to 10x

  27. raebaby420
    • 2 years ago
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    ..... sooo no one is going to help me but we will argue on my question?... Thanks guys

  28. raebaby420
    • 2 years ago
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    Now your confusing me and not helping me

  29. Jack1
    • 2 years ago
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    5x=-11+3y 10x = -22 + 6

  30. uri
    • 2 years ago
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    You are not even teaching her the right thing.Also,You are very mean and you don't know how to respond to someone..when they ask you a question. I might link you this: http://openstudy.com/code-of-conduct Next time if you're mean to me.I'll report you to Preetha. @Jack1

  31. Jack1
    • 2 years ago
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    so thats equation 1 in a form we can use now for equation 2: 2x − 6y = −14 change it so u get 10x on one side

  32. Jack1
    • 2 years ago
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    sorry, back to equation 1: it should be 10x = -22 + 6y, not 10x = -22 + 6, my bad now equation 2: 2x − 6y = −14 (times 5) 10x - 30y = -70 (add 30y to both sides) 10x - 30y + 30y = -70 + 30y 10x = -70 + 30y

  33. Jack1
    • 2 years ago
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    so equation 1 is now 10x = -22 + 6y and equation 2 is now 10x = -70 + 30y so 10x = -22 + 6y = -70 + 30y -22 + 6y = -70 + 30y can u solve from here?

  34. thomaster
    • 2 years ago
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    @Jack1 She made a new question http://openstudy.com/study#/updates/52120b0fe4b0450ed75d4d22

  35. Jack1
    • 2 years ago
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    @raebaby420

  36. uri
    • 2 years ago
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    Huehue.

  37. Jack1
    • 2 years ago
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    god u are such a girl XP

  38. uri
    • 2 years ago
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    You called me a boy dat mad me cry..:3

  39. uri
    • 2 years ago
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    made*

  40. Jack1
    • 2 years ago
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    im sorry i called u a boy, i was jus playing and i took it too far, my bad

  41. uri
    • 2 years ago
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    It's alright.

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