Question 501705
coffee	x	$/kg							
butter	y	$/kg							
									
9	x	+	6	y	=	42.75	.............1		
10	x	+	14	y	=	64	.............2		
Eliminate y									
multiply (1)by 		-14							
Multiply (2) by		6							
-126	x		-84	y	=	-598.5			
60	x		84	y	=	384			
Add the two equations									
-66	x				=	-214.5			
/	-66								
x	=	3.25		OR	3  1/ 4				
plug value of 			x	in (1)					
9	x	+	6	y	=	42.75			
29.25		+	6	y	=	42.75			
			6	y	=	42.75		-29.25	
			6	y	=	13.5			
				y	=	2.25		OR	2 1/4
coffee	3 1/4	$/kg							
butter	2 1/4	$/kg							
m.ananth@hotmail.ca