Помогите решить 5^3х-2*5^(3х-1)-3*5^(3х-2)=60

Question

Помогите решить
5^3х-2*5^(3х-1)-3*5^(3х-2)=60

Answer 1

5 ^ 3x • ( 1 - 2 • ( 1/5 ) - 3 • ( 1/25 )) = 60
1 - ( 2/5 ) - ( 3/25 ) = 1 - ( 10/25 ) - ( 3/25 ) = 1 - ( 13/25 ) = 12/25
5 ^ 3x • 12/25 = 60
5 ^ 3x = 60 : 12/25
5 ^ 3x = 125
5 ^ 3x = 5 ^ 3
3x = 3
X = 1