Respuesta :
Answer:
x + y = 20
x - y = 4
Add the 2 equations and get
2x = 24
x = 24/2 = 12
Plug x=12 into either equation and get
y = 8
Answer:
Step-by-step explanation:
A+B=20
12 and 8
There is a difference of 4 between them and they add up to 20.