Respuestas

2011-11-08T17:41:01+01:00

{7x - 5y = -11

{y = 3 + x

 

{7x - 5(3 + x) = -11

{y = 3 + x

 

{7x - 15 -5x = -11

{y = 3 + x

 

{7x - 5x = - 11 + 15

{y = 3 + x

 

{2x = 4 | :2

{y = 3 + x

 

{ x = 2

{ y = 3 + 2

 

{ x = 2

{ y = 5