Question 501696
coffee	x	$/kg						
butter	y	$/kg						
								
9	x	+	6	y	=	47.75	.............1	
10	x	+	14	y	=	64	.............2	
Eliminate y								
multiply (1)by 		-14						
Multiply (2) by		6						
-126	x		-84	y	=	-668.5		
60	x		84	y	=	384		
Add the two equations								
-66	x				=	-284.5		
/	-66							
x	=	4.31		OR	4 23/74			
plug value of 			x	in (1)				
9	x	+	6	y	=	47.75		
38.8		+	6	y	=	47.75		
			6	y	=	47.75		-38.8
			6	y	=	8.95		
				y	=	1.49		
coffee	4 1/3	$/kg						
butter	1 1/2	$/kg						
m.ananth@hotmail.ca