Solve for f
f=\frac{w}{2\pi }
Solve for w
w=2\pi f
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2\pi f=w
Swap sides so that all variable terms are on the left hand side.
\frac{2\pi f}{2\pi }=\frac{w}{2\pi }
Divide both sides by 2\pi .
f=\frac{w}{2\pi }
Dividing by 2\pi undoes the multiplication by 2\pi .
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