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    thatsme's Avatar
    thatsme Posts: 1, Reputation: 1
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    #1

    Jun 19, 2007, 09:35 PM
    rearranging formula
    how can I rearrange this formula. In order to express D in terms of the T and p (ie make D the subject of the formula)

    / = fraction

    T = Dp/50 +20



    thanks
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jun 20, 2007, 03:40 AM



    Subtract 20 from both sides.

    Multiply both sides by 50.

    Divide through by p.
    ginge123's Avatar
    ginge123 Posts: 1, Reputation: 1
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    #3

    Jun 25, 2010, 09:03 AM
    can anyine help me with this question : 9f+18=fx+2x making x the subject of the equation??
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Jun 25, 2010, 10:32 PM

    1. Factor x on the right side.
    2. Divide by something so that x becomes alone.
    yomisters's Avatar
    yomisters Posts: 1, Reputation: 1
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    #5

    Sep 2, 2010, 10:19 AM
    9f+18=f x x + 2x
    8f+18=x + 2x (3x)
    8f+18/3 = x
    / = Divide
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #6

    Sep 2, 2010, 11:50 AM

    yomisters - first, please note that this is an old thread. And second, you have an error - you wrote "f x x " in the first line, by which I assume you mean "f times x," but then treated that term like it was "f+x" by attempting to subtract f from both sides. The correct way to do this (as suggested by Unknown008) is to treat the right side as fx+2x = x(f+2) and the left hand side as 9f+18 = 9(f+2), and simply divide both sides by (f+2). This of course only works if f+2 is not equal to zero.
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