Question 854277
2	x	+	-1	y	=	1	.............1	
-1	y	=	1	+	-2	x		
/	-1	=						
	y	=	-1	+	2	x		
-4	x	+	-2	y	=	3		.....................2
Substitute y in		(2)						
-4	x	+	-2	(	-1	+	2	x
-4	x	+	2	+	-4	x	=	3
-4	x		-4	x	=	1		
-8	x	=	1					
/	-8							
x=	-  1/ 8							
Plug the value of x in (1)								
2	x	+	-1	y	=	1		
2	*	-  1/ 8	+	-1	y	=	1	
-  1/ 4	+	-1	y	=	1			
-1	y	=	5/ 4					
/	-1							
y=	-5/ 4							

x=-1/8, y = -5/4