f(X) = 8x-a. jika f(4) = 27. maka f(a)=...

Bab Fungsi
Matematika SMP Kelas VIII

f(x) = 8x - a
f(4) = 8 . 4 - a = 27
32 - a = 27
a = 32 - 27
a = 5

f(x) = 8x - a
f(a) = 8a - a
f(a) = 7a

f(5) = 7 . 5
f(5) = 35