Solve for h
\left\{\begin{matrix}h=\frac{V}{kw}\text{, }&w\neq 0\text{ and }k\neq 0\\h\in \mathrm{R}\text{, }&\left(w=0\text{ or }k=0\right)\text{ and }V=0\end{matrix}\right.
Solve for V
V=hkw
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kwh=V
Swap sides so that all variable terms are on the left hand side.
\frac{kwh}{kw}=\frac{V}{kw}
Divide both sides by kw.
h=\frac{V}{kw}
Dividing by kw undoes the multiplication by kw.
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