# How do you evaluate the function f(x) = 3x - 7 at f (5)?

$8$
Here,$f \left(x\right) = 3 x - 7$
For $f \left(5\right)$,we put $x = 5$
So,$f \left(5\right) = 3 \left(5\right) - 7 = 15 - 7 = 8$