Question 91113
LET X, X+1 & X+2 BE THE 3 NUMBERS.
X+(X+1)-(X+2)=68
X+X+1-X-2=68
X-1=68
X=68+1
X=69 ANSWER FOR THE FIRST NUMBER
X+1=70
X+2=71
PROOF
69+70-71=68
139-71=68
68=68