Dik : f(x+2)=8x-7 Dit : f(5) ? Pakai Invers Gak ?

Bab Fungsi
Matematika SMP Kelas VIII

x + 2 = 5
x = 5 - 2
x = 3

8x - 7 = 8 . 3 - 7 = 17

f(x+2) = 8x-7

fungsinya
f(x) = 8x - 23

f(5) = 8(5)-23
f(5) = 40-23
f(5) = 17