Question

8^(y - 2) = 2^y

Answer 1

y=3

Answer 2

This was just using my brain, sorry.

Answer 3

I know you set the bases equal, then put the extra numbers to distribute to the powers, then set the powers equal.

Answer 4

8^(y - 2) = 2^y
(2^3)^(y - 2) = 2^y
2^3(y - 2) = 2^y
3(y - 2) = y

now solve...

Answer 5

Yep ;P What he did.