Answer:
-5,-4,-3
Step-by-step explanation:
Let n be an integer.
The next integer would have to be n+1.
The integer before n would have to be n-1.
So the numbers in order are n-1, n , n+1
The sum of the first 2 equals 3 times the third:
n-1 + n = 3(n+1)
2n-1 = 3(n+1)
2n-1=3n+3
Subtract 2n on both sides
-1=n+3
Subract 3 on both sides
-4=n
If n=-4
then n-1=-5
and n+1=-3
So the three numbers are -5,-4,-3 .
