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Solve for X?

  1. #1
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    Solve for X?

    I need to be able to solve for x in a formula like this:

    (x/A1)-(x/A2)=A3

    I would already have values in A1, A2 and A3. I know that If I can isolate X on one side of the equation I should be good but since I don't know what the values of A1 and A2 are I'm not sure how to proceed.

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    Re: Solve for X?

    Using algebra

    (xA2/A2*A1)-(xA1/A1*A2)=A3 creating a common denominator
    (xA2-xA1)/(A1*A2)= A3 simplification
    (xA2-xA1)=A3(A1*A2) multiply both sides by A1*A2
    x(A2-A1) = A3*A1*A2 factoring out x

    x=A3*A1*A2/(A2-A1) divide both sides by A2-A1
    Last edited by ChemistB; 09-17-2014 at 12:37 PM. Reason: clarification
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  3. #3
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    Re: Solve for X?

    Thank you kind sir! Works perfect.

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