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dumbsearch2 Group Title

Solve the following system using the substitution method: 2x = y 6x + 4y = -14

  • one year ago
  • one year ago

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  1. AravindG Group Title
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    ok giveb y=2x

    • one year ago
  2. AravindG Group Title
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    *given

    • one year ago
  3. AravindG Group Title
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    now replace y in second equation with 2x

    • one year ago
  4. AravindG Group Title
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    then solve for x

    • one year ago
  5. AravindG Group Title
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    having got x substitute its value in first equation to get y

    • one year ago
  6. ParthKohli Group Title
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    So you understand Aravind's explanation?

    • one year ago
  7. ParthKohli Group Title
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    LOL, I am red as long as I don't refresh

    • one year ago
  8. dumbsearch2 Group Title
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    haha! ;D

    • one year ago
  9. dumbsearch2 Group Title
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    no i don't understand. :(

    • one year ago
  10. AravindG Group Title
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    where exactly you have doubt @dumbsearch2 ?

    • one year ago
  11. hba Group Title
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    Plug in y=2x in eq(2)

    • one year ago
  12. dumbsearch2 Group Title
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    how to find x

    • one year ago
  13. ParthKohli Group Title
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    \[\color{#C00}{2x} = y\]\[6x + 4\color{#T00}{\cdot y} = 6x + 4\cdot \color{#C00}{2x}\]

    • one year ago
  14. dumbsearch2 Group Title
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    how to find x? cause to find y you need to know x right?

    • one year ago
  15. hba Group Title
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    how to find y ? cause to find x you need to know y right?

    • one year ago
  16. AravindG Group Title
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    you have an equation containing only x when you substitute y with x.Then solve for x

    • one year ago
  17. AravindG Group Title
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    gt it now @dumbsearch2 ?

    • one year ago
  18. dumbsearch2 Group Title
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    nope. :( sorry I'm dumb...

    • one year ago
  19. AravindG Group Title
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    try to read the replies above again, try to understand what is said .

    • one year ago
  20. Callisto Group Title
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    The first equation we have is 2x = y, that is the same as y=2x. The second equation we have is 6x + 4y = -14. Now, we put y=2x into the second equation. That is whenever we see "y" in the second equation, we re-write it as "2x" So, we get: 6x + 4 (2x) = -14 Can you solve this?

    • one year ago
  21. ParthKohli Group Title
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    You know that \(2x = y\), right? So can you say that \(6x + 4y =14\) can be written as \(6x + 4(2x) = 14\)?

    • one year ago
  22. dumbsearch2 Group Title
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    x = -4 right?/

    • one year ago
  23. dumbsearch2 Group Title
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    no i mean -1? no?

    • one year ago
  24. ParthKohli Group Title
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    Hmm... yes!

    • one year ago
  25. dumbsearch2 Group Title
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    so y = -2! so y = -2, and x= -1! no?

    • one year ago
  26. ParthKohli Group Title
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    Sorry, it's not \(6x + 4y = 14\). I got my reply wrong :-P

    • one year ago
  27. ParthKohli Group Title
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    Yesh!

    • one year ago
  28. Callisto Group Title
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    *Clapping hands*

    • one year ago
  29. ParthKohli Group Title
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    Yay!

    • one year ago
  30. dumbsearch2 Group Title
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    :DD thanks so MUCHJ GUYS! im trying so hard to finish math online course for tomrrow... it closes on tomorrow, and I've got 2 units to do online!!! (each unit has like 4 lessons and 4 quizes) I'm kinda bad at the subtituation method and stuff, wish I would understand! it techinically is tomorrow, I mean it's the very very very early morning right now!!i know! I'm trying to use openstudy to help me too... (that's how I stumbled upon this site today!)

    • one year ago
  31. dumbsearch2 Group Title
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    So like this! (Confirm! :))

    • one year ago
  32. ParthKohli Group Title
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    Yes :-)

    • one year ago
  33. dumbsearch2 Group Title
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    yeaa! ;D

    • one year ago
  34. dumbsearch2 Group Title
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    got a 75% grade in the quiz, not bad. :D

    • one year ago
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