Respuesta :

Step-by-step explanation:

just plug in the numbers to the x values

if f(3) then ur equation would look like this f(3) = 4x - 5

then u solve it to get the answer.

  3 = 4x - 5

+ 5 = 4x + 5

------------------ ---> add 5 on both sides

 8 = 4x

now u just divide. 8 ÷ 4 = 2 so f(3) = 2