Solve for c
\left\{\begin{matrix}c=\frac{d}{8m}\text{, }&m\neq 0\\c\in \mathrm{R}\text{, }&d=0\text{ and }m=0\end{matrix}\right.
Solve for d
d=8cm
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8cm=d
Swap sides so that all variable terms are on the left hand side.
8mc=d
The equation is in standard form.
\frac{8mc}{8m}=\frac{d}{8m}
Divide both sides by 8m.
c=\frac{d}{8m}
Dividing by 8m undoes the multiplication by 8m.
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