Logarithm Help?

Question

Solve for x:

log (base 3) x + 4 log (base 9) x = 12

Answer 1

log (3) x + 4 log (9) x = 12
log (3) x + log (9) x^4 = 12
log (3) x + log (3) x^2 = 12
log(3) [x * x^2] = 12
log(3) x^3 = 12
3log(3) x = 12
log(3) x = 4
x=3^4