You can put this solution on YOUR website! Let x be the first integer.
Then x + (x+1) + (x+2) are three consecutive integers.
We know that the sum of the second (x+1) and the third (x+2) is (x+33)/2
So
Combine and simplify
Subtract 33 on both sides.
Multiply by 2 on both sides
Combine like terms.
Divide by -3
So the consecutive integers are 20,21,22.