Solve for a
\left\{\begin{matrix}a=\frac{F}{p}\text{, }&p\neq 0\\a\in \mathrm{R}\text{, }&F=0\text{ and }p=0\end{matrix}\right.
Solve for F
F=ap
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pa=F
Swap sides so that all variable terms are on the left hand side.
\frac{pa}{p}=\frac{F}{p}
Divide both sides by p.
a=\frac{F}{p}
Dividing by p undoes the multiplication by p.
Examples
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