f(x)=15x+2,f(3)=a, f(9)=b, tentukan nilai a

f(x) = 15x+2

f(3) = 15(3)+2 = a
f(3) = 45+2 = a
f(3) = 47 = a

a = 47

Maaf jika ada kesalahan :)

f(x) = 15x + 2
f(3) = a
a = 15(3) + 2
a = 45 + 2
a = 47