Find the value of x for which 32 base =22 base five?

You want 32x = 225 ?

3x + 2 = 2(5) + 2
3x = 10

x = 10/3

mmmhhh, bases of number systems are usually restricted to whole numbers, but mathematically it works.
3210/3 in base 10 = 3(10/3) + 2 = 12
225 in base 10 = 2(5) + 2 = 12