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Algebra Equation

  1. Apr 24, 2006 #1
    Hi, I've got this equation I need to figure out for my design project. It's been a few years since I did algebra and I just can't remember the next steps.

    I've simplified to:

    3y + (y*Pie)/2 = 62

    but I can't figure out how to move everything around to get y.

    Thanks to anyone who can help me.
     
  2. jcsd
  3. Apr 24, 2006 #2

    siddharth

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    Stilts,
    if ay+by=c, where a,b,c are constants, can you figure out how to solve for y? It's not that hard.
    Try taking 'y' common
     
  4. Apr 24, 2006 #3

    TD

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    So you've got [itex]3y + \frac{\pi }{2}y = 62[/itex]. Now factor out y in the lhs and divide both sides by its coefficient you get.
     
  5. Apr 24, 2006 #4
    How do you get the symbol graphics TD?

    So:

    3y + (y*Pie)/2 = 62
    3y + (Pie/2)y = 62
    3 + Pie/2 = 62/y
    62 / (Pie/2 + 3) = y
    13.56 = y


    My whole equation originally was:
    3y + x = 62, with x = (y*Pie)/2
    Making:
    (y*Pie)/2 = x
    (13.56*Pie)/2 = x
    42.61 = x

    However I've definately done something wrong:

    3y + x = 62
    3(13.56) + 42.61 62

    Thanks for the help so far.
     
  6. Apr 24, 2006 #5

    TD

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    It's LaTeX, click on it to see the code and check the first forum for information.

    This is correct, but I'd leave an exact answer, 13.56 is an approximation.

    [tex]y = \frac{{124}}{{\pi + 6}} \approx 13.56[/tex]

    It isn't 42.61, recheck that calculation.
     
  7. Apr 24, 2006 #6
    Yeah I wasn't using the approximations for calculating, just shortening for the forum.

    Argh I had the right answer written down then lost it. x = 21.31.

    Thanks heaps for the help dude, now it's time to get building. :biggrin:
     
  8. Apr 24, 2006 #7

    TD

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    You're welcome, good luck :smile:
     
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