Tentukan nilai x dari persamaan berikut 3 2x-1 = 81 x-2

[tex] 3^{(2x-1)} = 81^{(x-2)} \\ 3^{(2x-1)} = 3^{4(x-2)} \\ 3^{(2x-1)} = 3^{(4x-8)} \\ \\ 2x-1 = 4x-8 \\ 4x-2x = -1+8 \\ 2x = 7 \\ x = \frac{7}{2} [/tex]