Answer:
I'm not sure but thank you and have a Merry Christmas
13 units from 20 could either be 33 or 7; 15 units from -8 could either be 7 or 23.Since 7 satisfy both of the above requirements, Sarah's favorite number is 7. (You could show your work using a number line)
The two possibilities of Neil's favorite number are 26 and -12.
5/8 - 1/8 = 4/8
4/8 in it's simplest form is 1/2