Solve for f
\left\{\begin{matrix}f=-\frac{in}{28t}\text{, }&t\neq 0\\f\in \mathrm{C}\text{, }&n=0\text{ and }t=0\end{matrix}\right.
Solve for n
n=28ift
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28ft=-in
Swap sides so that all variable terms are on the left hand side.
28tf=-in
The equation is in standard form.
\frac{28tf}{28t}=-\frac{in}{28t}
Divide both sides by 28t.
f=-\frac{in}{28t}
Dividing by 28t undoes the multiplication by 28t.
-in=28ft
The equation is in standard form.
\frac{-in}{-i}=\frac{28ft}{-i}
Divide both sides by -i.
n=\frac{28ft}{-i}
Dividing by -i undoes the multiplication by -i.
n=28ift
Divide 28ft by -i.
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