From the sum of 3x-y+11and-y-11, subtract 3x-y-11 please solve this sum

Solution:

When we add 3x y + 11 and y -11 we get

3x - y +11

(+) - y 11

3x 2y

So when we subtract 3x-y-11 from 3x 2y we get:

3x 2y

- (-)3x (+)-y (+)-11

-3y + 11

Ans: - 3y + 11.