One of the numbers increased by 10. How did the average of the two numbers change?

Question

Pls tell me the answer thats all i neeed

Answer 1

current average: (x+y)/2
so, suppose y increases by 10. Then
new average: (x+ y+10)/2 = (x+y)/2 + 10/2
so, what do you think?
yes, please think, do not just ask for answers.

Answer 2

e.g. suppose your two numbers were 20 and 60
then their average is 40

now add 10 to one of them, what is your new number?

try it with 2 other numbers of your own