Question

solve for n

(5^9)^-3 x 5^2
--------------- =5^n
5^2

Answer 1

OK first of all

Do you understand about powers of numbers? About adding or multiplying the index etc.?

e.g.
x^a *x^b = x^(a+b)

Answer 2

if that is correct

first notice that you can immediately cancel 5^2 from the left side