Question

Let ​f(x)= -5x+6. Find and simplify ​f(3n−5​). f(3n-5)= ?

Answer 1

We know that our function is $f(x)=-5x+6$; the only thing we need to find $f(3n-5)$ is replace $x$ with $(3n-5)$ in our original function:
$f(x)=-5x+6$
$f(3n-5)=-5(3n-5)+6$

Now, lets simplify our function:
$f(3n-5)=-15n+25+6$
$f(3n-5)=-15n+31$

After simplify our function, we can conclude that $f(3n-5)=-15n+31$