cari nilai x pada soal dibawah.

jadikan jawaban terbaik jika membantu
Berikan terima kasih

ln (1/9)^x-1 = ln (1/27)^x
(x-1)(ln 1/9) = x ln 1/27
[(-ln 9)](x-1) = -(x-1) ln 9 = -(x-1) ln 3^2 = -2(x-1)ln 3
x ln 1/27 = (-ln 27)x = (-ln 3^3)x = -3x ln 3
-2 ln 3(x-1)= -3x ln 3
-2ln3(x) + 2ln3 = -3ln3(x)
-2ln3(x) = -3ln3(x) - 2ln3
-2ln3(x) + 3ln3(x) = -2ln3
ln3 x = -2 ln3 ................... dibagi ln3
x = -2