(3)^x = (1/81)^x-3

Question

(3)^x = (1/81)^x-3

Answer 1

3^x = ((3^-4)^x-3) ---> 3^x = 3^(12-4x) ---> x = -4x + 12 ---> x = 2.4

Answer 2

Упростим:
x=12-4x
x=2.4.