how to make f the subject 1/u=1/v-1/f

how to make f the subject
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Multiply throughout by uvf (common denominator): vf=uf-uv. Add uv to both sides: uv+vf=uf, then subtract vf from both sides: uv=uf-vf=f(u-v) (factoring). Divide both sides by (u-v): uv/(u-v)=f, so f=uv/(u-v).

by Top Rated User (1.1m points)

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