diketahui fungsi f(x):2-7x dan f(k+2):16. nilai k adalah

f(x) = 2-7x
f(k+2) = 16
k=??

f(k+2) = 2-7(k+2) = 16

2-7(k+2) = 16
2 - 7k - 14 = 16
-7k = 16 + 14 - 2
-7k = 28
k = 28/-7
k = -4