For this case we must find the sentence that best describes the equation given by:
[tex]78 + y = 105[/tex]
It is observed that at 78 a number is added, which can be any, and the sum results in 105.
So, the sentence that best fits is:
The sum of 78 and a number is 105
Answer:
The sum of 78 and a number is 105
Option A