Question

log base 25 (log x base 3) = 1/2

Answer 1

log[25](log[3](x)) = 1/2
Considerando y = log[3](x):
log[25](y) = 1/2
25^(½) = y
5 = y
log[3](x) = 5
3^(5) = x
x = 243