The expression for the sum of these integers is 3n
Let the first number be n-2
Let the middle number be n
Let the third number be n+2
The expression for the sum of these integers will be:
=(n - 2) + n + (n + 2)
= n - 2 + n + n + 2
Collect like terms
= 3n
The expression for the sum of these integers is 3n
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