tolong bantu yg no 23 piiis

f(x) = 2 - 7x
f(k+2)=16
f(k+2) = 2 - 7(k+2)
16 = 2 - 7k - 14
7k = 2 - 14 - 16
7k = -28
k = -4
jadi jawabannya D (-4)