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anonymous

  • one year ago

Hello I need help solving these system of equations. Step by step not just the answer. Thank you. x + 3y = -1 2x + 2y = 6 A(-4, 1) B(2, -1) C(4, -1) D(5, -2)

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  1. Jhannybean
    • one year ago
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    So lets say we wanted to eliminate x if we added both of the equations together, hwo would you do that?

  2. anonymous
    • one year ago
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    I knew I needed to eliminate a variable, I'm just not sure how to set up the equations together. 2(3y -1) + 2y=-6 ??? @Jhannybean

  3. anonymous
    • one year ago
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    Thank you for your time btw

  4. Jhannybean
    • one year ago
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    First try multiplying -2 to the entire first equation. -2(x + 3y = -1) 2x + 2y = 6 _____________________________ Now rewrite both equations after expanding the first one.

  5. anonymous
    • one year ago
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    @Jhannybean I am having a difficult time

  6. Jhannybean
    • one year ago
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    Okay let's start you off. multiplying 2 to each term within the parenthesis, you get: -2x - 6y = 2 2x + 2y = 6 ________________ Did you see what i did?

  7. anonymous
    • one year ago
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    Ok yes! I know there is more to understand

  8. anonymous
    • one year ago
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    @Jhannybean

  9. anonymous
    • one year ago
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    I want to know how I solve the other one

  10. Jhannybean
    • one year ago
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    The other one?

  11. anonymous
    • one year ago
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    Is still don't have a full understanding! @Jhannybean I have to solve more problems like this And I want to be able to do it on my own

  12. Jhannybean
    • one year ago
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    Have you finished solving this one?

  13. anonymous
    • one year ago
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    No, I thought you were explaining the steps on how to solve it. So you got -2x-2y= 6 by multiplying 2 to each term. Idk what to do next or even where you got the number 2 :(

  14. Jhannybean
    • one year ago
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    OK after the step i wrote above, you want to ADD the two equations together. -2x - 6y = 2 2x + 2y = 6 ___________________ 0x - 4y = 8 - 4y = 8 Divide both sides by -4 to isolate y, and you'll have your answer for the "y" portion

  15. anonymous
    • one year ago
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    so -4 divided by -4?That equals 1

  16. anonymous
    • one year ago
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    I am so confused @Jhannybean

  17. Jhannybean
    • one year ago
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    yes thats correct,t hen what is 8/ -4 ?

  18. anonymous
    • one year ago
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    -2

  19. anonymous
    • one year ago
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    I don't know the answer or the steps to get the answer. :( @Jhannybean

  20. Jhannybean
    • one year ago
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    Okay, you're almost there!

  21. Jhannybean
    • one year ago
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    Now that we have y, we can use this value to find x. Let's take the first equation for example. x + 3y = -1 If we use our value, y = -2, we can find x. x + 3(-2) = -1 x = -1 +6 x = ?

  22. anonymous
    • one year ago
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    5!!!!!!!!!!!!!!!!!! Holy cow the answer is D (5,-2) Could you please help me with a similar question. I don't get how you got the negative two :) @Jhannybean

  23. Jhannybean
    • one year ago
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    We got the -2 when we eliminated x to solve for y. Look at the above posts.

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