Question 474394
1	x	+	1	y	=	5	.............1		
1	x		-1	y	=	-9	.............2		
									
multiply (1)by 		1							
Multiply (2) by		1							
1	x	+	1	y	=	5			
1	x	+	-1	y	=	-9			
Add the two equations									
2	x				=	-4			
/	2								
x	=	-2							
plug value of 			x	in (1)					
1	x	+	1	y	=	5			
-2		+	1	y	=	5			
			1	y	=	5	+	2	
			1	y	=	7			
				y	=	7.