Question

ache o valor de x e y

$x + y = 8$
$x - y = - 4$

Answer 1

x + y = 8

x - y = - 4


2x = 4

x = 4/2

x = 2


y = 8 - x

y = 8 - 2

y = 6



S = { 2 , 6 }