Respuesta :

s141410caditi13881

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.