Question 563804
-3	x	+	1	y	=	-8	.............1	
1	x	+	1	y	=	4	.............2	
Eliminate y								
multiply (1)by 		-1						
Multiply (2) by		7						
3	x		-1	y	=	8		
7	x		7	y	=	28		
Add the two equations								
10	x				=	36		
/	10							
x	=	3.60				
plug value of 			x	in (1)				
-3	x	+	1	y	=	-8		
-10.8		+	1	y	=	-8		
			1	y	=	-8	+	10.8
			1	y	=	2.8		
				y	=	2.80