Logarithm question

Question

Log₃9^x=10

i need to find the domain

i got the solution x=5 but now I just need a domain

Answer 1

3^10 = 9^x = 3^2x

2x = 10

x = 10/2

x=5

domain of x is any real number

(You might be tempted to think only positive numbers, as logs have no values or of negative numbers, but x is in the exponent, and will only make 9 into a positive number, whether x is > or < zero)