Question 485805
7	x	+	3	y	=	12	.............1	
3	x	+	7	y	=	6	.............2	
Eliminate y								
multiply (1)by 		7						
Multiply (2) by		-3						
49	x		21	y	=	84		
-9	x		-21	y	=	-18		
Add the two equations								
40	x				=	66		
/	40							
x	=	1.65					
plug value of 			x	in (1)				
7	x	+	3	y	=	12		
11.55		+	3	y	=	12		
			3	y	=	12		-11.55
			3	y	=	0.45		
				y	=	0.15		

x-y = 1.5

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