F(x)= 3x+5fa) = 17a-1=please cepet bntu​

Penjelasan dengan langkah-langkah:

f(x) = 3x + 5

f(a) = 17

3a + 5 = 17

3a = 17 – 5

3a = 12

a = 12/3

a = 4

maka :

a – 1 = 4 – 1 = 3