Question 489657
6	x	+	1	y	=	46	.............1	
6	x		-1	y	=	38	.............2	
Eliminate y								
Add the two equations								
12	x				=	84		
/	12							
x	=	7    			
plug value of 			x	in (1)				
6	x	+	1	y	=	46		
42		+	1	y	=	46		
			1	y	=	46		-42
			1	y	=	4		
				y	=	4