4^2x+1 . 3^4x = 64 nilai x yang menenuhi persamaan diatas adalah?

4^2x . 4^1 . 3^4x = 64
(2^2)^2x . 3^4x = 64/4
2^4x . 3^4x = 16
(2×3)^4x = 16
6^4x = 16
4x = 6log16
x = 1/4(6log16)
x = 6log 2