The sum of 3 consecutive odd integers is 12 less than 3 times the middle integer.
Let smallest integer be S
Then middle and largest are: S + 2, and S + 4, respectively
We then get: S + S + 2 + S + 4 = 3(S + 2) - 12
Solve for S to get the smallest
I don't know which integer you seek as you didn't state this. However after finding the first, you certainly can find the others, if needed.