Solve for B
\left\{\begin{matrix}B=-\frac{A}{C}\text{, }&C\neq 0\\B\in \mathrm{R}\text{, }&A=0\text{ and }C=0\end{matrix}\right.
Solve for A
A=-BC
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BC=-A
Subtract A from both sides. Anything subtracted from zero gives its negation.
CB=-A
The equation is in standard form.
\frac{CB}{C}=-\frac{A}{C}
Divide both sides by C.
B=-\frac{A}{C}
Dividing by C undoes the multiplication by C.
A=-BC
Subtract BC from both sides. Anything subtracted from zero gives its negation.
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