Respuesta :
x+y = 6
x-y = 2
x = 2+y
2+y+y = 6
2y = 6-2
2y = 4
y = 4/2
y = 2
x = 2+y
x = 2+2
x = 4
x-y = 2
x = 2+y
2+y+y = 6
2y = 6-2
2y = 4
y = 4/2
y = 2
x = 2+y
x = 2+2
x = 4