Question

Помогите решить:

log1/27(4x+1)= -1

Answer 1

(1/27)^( - 1) = 4x + 1
(3^(-3))^(-1) = 4x + 1
4x + 1 = 27 
4x = 27 - 1
4x = 26 
x = 6,5