<PRE><B>Question 869688</B>
1	x	+	4	y	=	16	.............1	
Total value								
3	x	+	4	y	=	8	.............2	
Eliminate	y							
multiply (1)by		-1						
Multiply (2) by		1						
-1	x		-4	y	=	-16		
3	x	+	4	y	=	8		
Add the two equations								
2	x				=	-8		
/	2							
x	=	-4						
plug value of			x	in (1)				
1	x	+	4	y	=	16		
-4		+	4	y	=	16		
			4	y	=	16	+	4
			4	y	=	20		
				y	=	5		
x=	-4		</PRE>