One son plays both, so subtract 1 from both categories. You're left with 1 son who plays both, 2 sons who play only football, and 1 son who plays only baseball. She has 4) 4 sons.
I think is 3 and 2/3 (I hope I got it right)
15 is A, 22+X=8
I don't have time to solve the rest RN but will come back later
