Log1/4 (1-3x) = -1 помогите!!

Question

Log1/4 (1-3x) = -1
помогите!!

Answer 1

Log1/4 (1-3x)=-1
одз: 1-3х>0
log1/4 (1-3x)= log1/4 (1/4)^-1 <=>
<=> 1-3x=(1/4)^-1
1-3x=4
-3x=3
x=-1
ответ: -1