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Math Help - Rearranging Equations

  1. #1
    Newbie
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    Nov 2011
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    1

    Rearranging Equations

    Anyone help me solve these so that x is the subject

    x = 7y

    x + v = w

    x divided by 3 = w+y

    Thanks

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  2. #2
    Super Member Quacky's Avatar
    Joined
    Nov 2009
    From
    Windsor, South-East England
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    901

    Re: Rearranging Equations

    Here's 2)

    x^2+v=w

    I need to isolate the term with x in it. I can do this by subtracting v from both sides to give:

    x^2=w-v

    And now, I just need to take the square root to obtain:

    x=\sqrt{w-v}

    Note that it should ideally be |x|, but I think that's running before we can walk.

    Try the others for yourself and show your working if you get confused: it's very similar to this example.
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