Question

Help!!!

Given the function f(x) = x/3 + 7. Find the input for which f(x) = 13

Answer 1

$

\begin{cases}

f(x)=x/3+7\\

f(x)=13

\end{cases}

$

We find that

$13=x/3+7\Longrightarrow x=\boxed{18}$

Hope this helps.