Question 911148
Let x be any integer.Then x, x+1, x+2 are three consecutive integers and x is the smallest of the three. 

then x+(x+1)+(x+2)=2x+15
=>   x+x+1+x+2    =2x+15
=>   x+x+x+1+2    =2x+15
=>   3x+3         =2x+15
=>   3x-2x        =15-3
=>   x            =12
Therefore, 12, 13, 14 are the integers