<PRE><B>Question 714705</B>
3	x		-4	y	=	-15	.............1	
Total value								
5	x	+	1	y	=	-2	.............2	
Eliminate	y							
multiply (1)by		1						
Multiply (2) by		4						
3	x		-4	y	=	-15		
20	x	+	4	y	=	-8		
Add the two equations								
23	x				=	-23		
/	23							
x	=	-1      						
plug value of			x	in (1)				
3	x		-4	y	=	-15		
-3			-4	y	=	-15		
			-4	y	=	-15	+	3
			-4	y	=	-12		
				y	=	3      		
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