(8 pangkat x) pangkat 2 = 16

8^2x = 16
2^6x = 2^4
6x = 4
x = 2/3

(8^x)^2 = 16
8^2x = 16
(2^3)^2x = 2^4
2^6x = 2^4 (2^ coret)

6x = 4
x = 4/6 = 2/3

^ = pangkat

maaf kalau salah
semoga membantu