Solve for a
\left\{\begin{matrix}a=-\frac{c-5}{b}\text{, }&b\neq 0\\a\in \mathrm{R}\text{, }&c=5\text{ and }b=0\end{matrix}\right.
Solve for b
\left\{\begin{matrix}b=-\frac{c-5}{a}\text{, }&a\neq 0\\b\in \mathrm{R}\text{, }&c=5\text{ and }a=0\end{matrix}\right.
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ab=5-c
Subtract c from both sides.
ba=5-c
The equation is in standard form.
\frac{ba}{b}=\frac{5-c}{b}
Divide both sides by b.
a=\frac{5-c}{b}
Dividing by b undoes the multiplication by b.
ab=5-c
Subtract c from both sides.
\frac{ab}{a}=\frac{5-c}{a}
Divide both sides by a.
b=\frac{5-c}{a}
Dividing by a undoes the multiplication by a.
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