Question 885701
Take any set of 3 consecutive integers. All such sets are solutions.
Example 1:
-1, 0, and 1 are three consecutive integers.
The smallest is -1; the largest is 1, and their sum is -1+1=0.
The middle integer is 0, and twice 0 is 0, which is the same as the sum above.
Example 2:
4, 5, and 6 are three consecutive integers.
The smallest is 4; the largest is 6, and their sum is 4+6=10.
The middle integer is 5, and twice 5 is 10, which is the same as the sum above.