solve with logs

Question

3^(1-2x)=4^(x)

Answer 1

How do I do this also: write the expression as a single logarithm

21 log (base 3)time the cube root of x + log (base 3) * 9x^2 - log (base 5)25

Answer 2

As you have it printed, I would do the following.
(1-2x)log 3 = xlog 4
Solve that. I get x = 0.306