Answer:
x= 20
Step-by-step explanation:
81^5 = 3^x
(3^4)^5= 3^x
3^20= 3^x
20= x
therefore 81^5= 3^20
20
81 ^5 =3 ^x
(3 ^4) ^5 =3 ^x
3 ^(4×5) =3 ^x
3 ^20 =3 ^x
x=20
