Question

Given f(x) =the quantity of 5x plus 1, divided by 2 , solve for f−1(8)

Answer 1

Is this your function
\[
f(x)=\frac{5x+1}2
\]

Answer 2

and you want
\[
f^{-1}(8)
\]

Answer 3

Solve for x
\[
\frac{5x+1}2=8
\]
and you will be done

Answer 4

Or
5 x+1 =16
What is x?