Question

Form an expression for the sum of three consecutive odd integers if the smallest number is x.

(difference between consecutive odd integers is 2)

Answer 1

3x + 6.

Explanation:

That would be x + x +2 + x + 4

= 3x + 6.

Verify this by adding 7 9 and 11:

7 + 9 + 11 = 27

3(7) + 6 = 21 + 6 = 27.