Solve for E
\left\{\begin{matrix}E=\frac{fh}{\Delta }\text{, }&\Delta \neq 0\\E\in \mathrm{R}\text{, }&\left(h=0\text{ or }f=0\right)\text{ and }\Delta =0\end{matrix}\right.
Solve for f
\left\{\begin{matrix}f=\frac{E\Delta }{h}\text{, }&h\neq 0\\f\in \mathrm{R}\text{, }&\left(\Delta =0\text{ or }E=0\right)\text{ and }h=0\end{matrix}\right.
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\Delta E=fh
The equation is in standard form.
\frac{\Delta E}{\Delta }=\frac{fh}{\Delta }
Divide both sides by \Delta .
E=\frac{fh}{\Delta }
Dividing by \Delta undoes the multiplication by \Delta .
hf=\Delta E
Swap sides so that all variable terms are on the left hand side.
hf=E\Delta
The equation is in standard form.
\frac{hf}{h}=\frac{E\Delta }{h}
Divide both sides by h.
f=\frac{E\Delta }{h}
Dividing by h undoes the multiplication by h.
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