Question

explain it fully , I need answer fast​

Answer 1

Answer:

3

Step-by-step explanation:

3^3^7 = 3^7x

3^21 = 3^7x

equating the powers

7x = 21

x = 21/7

x = 3

Answer 2

Answer:

X=3

Step-by-step explanation:

{(3^3)^7} = 3^7x

{(a^m)^n} = a^m×n

Now, 3^3×7 = 3^7x

3^21= 3^7x

Now consider only powers

21 = 7x

21/7 =X

3 = X

X = 3