Solve for n
\left\{\begin{matrix}n=\frac{p}{t}-2\text{, }&t\neq 0\\n\in \mathrm{R}\text{, }&p=0\text{ and }t=0\end{matrix}\right.
Solve for p
p=t\left(n+2\right)
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nt+2t=p
Swap sides so that all variable terms are on the left hand side.
nt=p-2t
Subtract 2t from both sides.
tn=p-2t
The equation is in standard form.
\frac{tn}{t}=\frac{p-2t}{t}
Divide both sides by t.
n=\frac{p-2t}{t}
Dividing by t undoes the multiplication by t.
n=\frac{p}{t}-2
Divide p-2t by t.
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