Question 741194
x= 	cost of 1 watch							
y=	cost of second watch							
 								
1.00	x	+	1.00	y	=	840.00	.............1	
Total value								
0.16	x		-0.12	y	=	0.00	.............2	
Eliminate	y							
multiply (1)by		0.12						
Multiply (2) by		1.00						
0.12	x		0.12	y	=	100.80		
0.16	x		-0.12	y	=	0.00		
Add the two equations								
0.28	x				=	100.80		
/	0.28							
x	=	360.00						
plug value of			x	in (1)				
1.00	x	+	1.00	y	=	840.00		
360.00		+		y	=	840.00		
				y	=	840.00		-360.00
				y	=	480.00		
				y	=	480.00		
x=	360.00		cost of 1 watch	0.00				
y=	480.00		cost of second watch	0.00				
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