Answer:
Step-by-step explanation:
An odd number can be represented by 2n-1
The odd number after this can be represented as 2n+1
(n representing any integer)
So add these numbers together
(2n-1)+(2n+1) = 4n
You can use any odd number to replace the 1 as long as they are 2 away from each other (eg, 11 and 13), just I find it easiest to use positive and negative 1. You can also use any even number to replace the 2, however I advise using 2 as you will get a simple expression.
Hope this Helps! :)