Question 740746
x= 	pounds of	coffee type I						
y=	pounds of	coffee type II						
 								
1.00	x	+	1.00	y	=	121.00	.............1	
Total value								
5.45	x	+	4.20	y	=	571.95	.............2	
Eliminate	y							
multiply (1)by		-4.20						
Multiply (2) by		1.00						
-4.20	x		-4.20	y	=	-508.20		
5.45	x	+	4.20	y	=	571.95		
Add the two equations								
1.25	x				=	63.75		
/	1.25							
x	=	51.00						
plug value of			x	in (1)				
1.00	x	+	1.00	y	=	121.00		
51.00		+		y	=	121.00		
				y	=	121.00		-51.00
				y	=	70.00		
				y	=	70.00		
x=	51.00		pounds of	coffee type I				
y=	70.00		pounds of	coffee type II