<PRE><B>Question 585286</B>
1	x	+	1	y	=	1	.............1	
-2	x	+	1	y	=	4	.............2	
Eliminate	y							
multiply (1)by		1						
Multiply (2) by		-1						
1	x		1	y	=	1		
2	x		-1	y	=	-4		
Add the two equations								
3	x				=	-3		
/	3							
x	=	-1      						
plug value of			x	in (1)				
1	x	+	1	y	=	1		
-1    		+	1	y	=	1		
			1	y	=	1+1      
			1	y	=	2      		
				y	=	2      		
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