Question 681956
x x+1 x+2
...
3x = x+1+x+2+8
3x = 2x + 11
3x - 2x = 11
x = 11
...
The numbers are 
11, 12 and 13
.....................
Have more questions? 
Email: HomeworkHelpers@readingboosters.com
Delighted to help.
-Reading Boosters
Website: www.MyHomeworkAnswers.com 
Wanting for others what we want for ourselves.