Ok So I am given:

(e,N) = (7,33)

The Received message s = 2. What is the original message (m) sent?

So I start out by calculating my p and q.

N = p*q -> p = 11 q = 3

phi(n) = (p-1)(q-1)

Then using this formula

ed = 1(mod(phi(n)))

and that results in a d = 3. But I am starting to think that this is the encryption formula. Our teacher did not really specify which formula to use with what part. Am I at all on the right track?