Question 817064
-1	x	+	1	y	=	3	.............1				
1	y	=	3	+	1	x					
/	1	=									
	y	=	3	+	1	x					
3	x	+	3	y	=	4		.....................2			
Substitute y in		(2)									
3	x	+	3	(	3	+	1	x	)	=	4
3	x	+	9	+	3	x	=	4			
3	x		3	x	=	-5					
6	x	=	-5								
/	6										
x=	-  5/ 6										
Plug the value of x in (1)											
-1	x	+	1	y	=	3					
-1	*	-  5/ 6	+	1	y	=	3				
  5/ 6	+	1	y	=	3						
y	=	2  1/ 6																		
y=	13/ 6										
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