Respuesta :

 {x,y} = {-7/4,-2} 

Explanation:
System of Linear Equations entered :
 [1] 8x+y=-16
 [2] -3+y=-5

Equations Simplified or Rearranged : 
  [1] 8x + y = -16
 
  [2] y = -2

Regards
Sonny