Answer
$f(3)=1$
Work Step by Step
Substituting $
x=3
$ in the given function, $
f(x)=2x-5
$ then
\begin{align*}\require{cancel}
f(3)&=2(3)-5
\\&=
6-5
\\&=
1
\end{align*}
Hence $
f(3)=1
$.
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