Question

Resolva o sistema 2x+y=0 2x-y=4

Answer 1

{2x + y = 0

{2x - y = 4

4x = 4

x= 4/4

x= 1

2x + y = 0

2 • 1 + y = 0

2 + y = 0

y=0 - 2

y= - 2

S= ( 1 , - 2)

Answer 2

resolução!

2x + y = 0

2x - y = 4

4x = 4

X = 4/4

X = 1

Y = 0 - 2x

Y = 0 - 2

Y = - 2

S = { X = 1 e Y = - 2 }