Question

x+y= 11
x-y=1


Ajudem ae !!

Answer 1

x +y = 11 ⇒⇒⇒⇒⇒ x= 11 -y
x -y = 1                    x= 11 -5
11 -y -y = 1              x= 6
-y -y = 1 -11
-2y = -10 . (-1)
2y = 10
y = 10/2
y= 5

Bons estudos!