4x - 5
Or what kind of an answer are you looking for?
Answer:
20.65%
Step-by-step explanation:

You must equal zero, so that way 2x can equal 2x
Answer:
I think it's 5 to the power of 8
Step-by-step explanation:
Just put (5^4)2 in the calculator to get 390,625. Then put 5^8 in the calculator to get the same number 390,625.