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17 February, 20:51

F = u*v / u + v make u the subject of this formula

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  1. 17 February, 21:18
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    F = u*v / u + v

    multiply both sides by u+v.

    F (u+v) = u*v

    opening bracket

    Fu+Fv=u*v

    Fu=u*v-Fv

    factor out v on the right hand side;

    Fu=v (u-F)

    dividing both sides by (u-F)

    Fu / (u-F) = v

    v=Fu / (u-F)
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