tolong dengan caranya

64^2x-1 = 16
(2^6)^2x-1 = 2⁴
=> 6(2x - 1) = 4
=> 12x - 6 = 4
=> 12x = 4 + 6
=> 12x = 10
=> x = 10/12
=> x = 5/6 ( C )