Ребят помогите решить...

Ребят помогите решить систему уравнений {x+xy+y=-3
{x-xy+y=1

 

  {
x+xy+y=_-  3                                                                

 
{x(1+y)+y=_-3
{x(1-y)+y=1
{x(1+y)+y=-3
{x(1-y)=1-y |: 1-y не равно
нулю, у не равен 1.
 
{x(1+y)+y=-3                                           
 при у=1 {х+х+1=-3
{x=1                                                                    
 {x-x+1=1
 
1+y+y=-3                                                             
{2x=-4
2y=-3-1                                                                 {0x=0
2y=-4
y=-4:2                                                                   x=2
y=2                                                    
 
x-любое
Ответ: (1;2), (2;1)