Substitute \(x=3\) into \(fx={11}^{x}\).
Start with the original equation.
\[fx={11}^{x}\]
Let \(x=3\).
\[f\times 3={11}^{3}\]
Simplify.
\[3f=1331\]
\[3f=1331\]
Solve for \(f\) in \(3f=1331\).
Solve for \(f\).
\[3f=1331\]
Divide both sides by \(3\).
\[f=\frac{1331}{3}\]
\[f=\frac{1331}{3}\]
Therefore,
\[\begin{aligned}&f=\frac{1331}{3}\\&x=3\end{aligned}\]
f=1331/3;x=3
