Question

me ajudaaaaa
resolva os sistemas

3x-y=-23
x+y=3

Answer 1

Resposta:

{3x-y= -23

{x+y=3 ==x= 3-y

3x-y= -23

3.(3-y)-y= -23

9-3y-y= -23

-4y= -23-9

-4y= -32.(-1)

4y= 32

y= 32/4

y= 8

x+y= 3

x+8=3

x= 3-8

x= -5

Verificando:

3x-y= -23

3.(-5)-8= -23

-15-8= -23

-23= -23

Answer 2

{3x-y=23
{y=3-x

3x-(3-x)=-23

X= -5
Y= 8

(X,y)= ( -5, 8)

{3x ( -5) -8 = -23
{ -5+8=3

{ -23=-23
{ 3=3

Solução= (x,y) = ( - 5,8)