The function f has the property that, for all x, 3f(x) = f(3x), if f(6) = 12, what is the value of f(2)?

f(2) = 4

If  f(6)  = 12

Then  f (3 * x)  = 12

Then  x  = 2

So....this means that   3 f(x)   = 12

Implies that

f ( x)  = 4

So

f (2)  = 4