<PRE><B>Question 461175</B>
3	x	+	1	y	=	8	.............1	
-2	x	+	1	y	=	-7	.............2	
Multiply (2) by		-1						
3	x	+	1	y	=	8		
2	x	+	-1	y	=	7		
Add the two equations								
5	x				=	15		
/	5							
x	=	3						
plug value of 			x	in (1)				
3	x	+	1	y	=	8		
9		+	1	y	=	8		
			1	y	=	8		-9
			1	y	=	-1		
				y	=	-1		
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