Solve for k
\left\{\begin{matrix}k=\frac{m}{2p}\text{, }&p\neq 0\\k\in \mathrm{R}\text{, }&m=0\text{ and }p=0\end{matrix}\right.
Solve for m
m=2kp
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2pk=m
Swap sides so that all variable terms are on the left hand side.
\frac{2pk}{2p}=\frac{m}{2p}
Divide both sides by 2p.
k=\frac{m}{2p}
Dividing by 2p undoes the multiplication by 2p.
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