You can put this solution on YOUR website! Let the larger integer be n so the smaller integer is n-1.
Then, set it up:
n = 3(n-1) - 6
And solve:
n = 3n - 3 - 6
n = 3n - 9
-2n = -9
n = 4.5
This is not an integer so there is no integer solution to the problem.