Solve for f
f=\frac{3m^{2}}{e}
m\geq 0
Solve for m
m=\frac{\sqrt{3ef}}{3}
f\geq 0
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\sqrt{\frac{1}{3}ef}=m
Swap sides so that all variable terms are on the left hand side.
\frac{e}{3}f=m^{2}
Square both sides of the equation.
\frac{3\times \frac{e}{3}f}{e}=\frac{3m^{2}}{e}
Divide both sides by \frac{1}{3}e.
f=\frac{3m^{2}}{e}
Dividing by \frac{1}{3}e undoes the multiplication by \frac{1}{3}e.
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