4x = 64
Do you calculate x in your head, however that works?
Note that 4 = 2^2
And 64 = 2^6
So...we have
4^x = 64
(2^2)^x = 2^6
2^(2x) = 2^6
Since the bases are the same, we can solve for the exponents
2x = 6 divide both sides by 2
x = 3
