Solve for c
\left\{\begin{matrix}c=\frac{A}{65m}\text{, }&m\neq 0\\c\in \mathrm{R}\text{, }&A=0\text{ and }m=0\end{matrix}\right.
Solve for A
A=65cm
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65cm=A
Swap sides so that all variable terms are on the left hand side.
65mc=A
The equation is in standard form.
\frac{65mc}{65m}=\frac{A}{65m}
Divide both sides by 65m.
c=\frac{A}{65m}
Dividing by 65m undoes the multiplication by 65m.
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