Question

Please help

f(x) = fx-2
Find f(3)
[?]
Enter the number that belongs in the green box.
Simplify completely.

Answer 1

$f(x)=\dfrac{4}{5}x-2\\\\\\f(3)=\dfrac{4}{5}\cdot3-2=\dfrac{12}{5}-2=\dfrac{12}{5}-\dfrac{10}{5}=\boxed{\frac{2}{5}}$