Solve for a
\left\{\begin{matrix}a=\frac{n+p}{m}\text{, }&m\neq 0\\a\in \mathrm{R}\text{, }&n=-p\text{ and }m=0\end{matrix}\right.
Solve for m
\left\{\begin{matrix}m=\frac{n+p}{a}\text{, }&a\neq 0\\m\in \mathrm{R}\text{, }&n=-p\text{ and }a=0\end{matrix}\right.
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ma=n+p
The equation is in standard form.
\frac{ma}{m}=\frac{n+p}{m}
Divide both sides by m.
a=\frac{n+p}{m}
Dividing by m undoes the multiplication by m.
am=n+p
The equation is in standard form.
\frac{am}{a}=\frac{n+p}{a}
Divide both sides by a.
m=\frac{n+p}{a}
Dividing by a undoes the multiplication by a.
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