Question

se ,(x+2y=8),entao quanto vale ×?
(2x-y=6)

Answer 1

$\left \{ {{x+2y=8} \atop {x+2y=8}} \right.$

x = 8 -2y

2(8 -2y)  -y = 6
-4y -y= 6 -16
-5y = -10
y = 10/5
y = 2

x = 8 -2(2)
x = 8 -4
x = 4