Question 559412
7	x	+	2	y	=	10	.............1	
-7	x	+	1	y	=	-16	.............2	
Eliminate y								
multiply (1)by 		1						
Multiply (2) by		-2						
7x+2y=10		
14x-2y=	32		
Add the two equations								
21x=42		
/21							
x=2   			
plug value of 			x	in (1)				
7	x	+	2	y	=	10		
14		+	2	y	=	10		
			2	y	=	10-14
			2	y	=	-4		
				y	=	-2		
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