Question 535037
2	x	+	1	y	=	10	.............1	
1	x		-1	y	=	5	.............2	
Eliminate y								
multiply (1)by 		1						
Multiply (2) by		1						
2	x	+	1	y	=	10		
1	x	+	-1	y	=	5		
Add the two equations								
3	x				=	15		
/	3							
x	=	5						
plug value of 			x	in (1)				
2	x	+	1	y	=	10		
10		+	1	y	=	10		
			1	y	=	10		-10
				y	=	0