Question

find pairs of fractions that can be added or substracted to given the answer 9/12.

Answer 1

let one fraction be x.. another be y..
then, .
x+y=9/12
y=9/12-x
Now..
x-y=9/12
x-(9/12-x)=9/12
2x=9/6
x=9/12..
and you can take y as 0/N
where N is any no..