Question 553250
paper clips boxes		$	x					
Index card packets		$	y	0				
								
15	x	+	7	y	=	55.5	.............1	
12	x	+	10	y	=	61.7	.............2	
Eliminate y								
multiply (1)by 		-10						
Multiply (2) by		7						
-150	x		-70	y	=	-555		
84	x		70	y	=	431.9		
Add the two equations								
-66	x				=	-123.1		
/	-66							
x	=	1.87			
plug value of 			x	in (1)				
15	x	+	7	y	=	55.5		
27.98		+	7	y	=	55.5		
			7	y	=	55.5-27.98
			7	y	=	27.52		
				y	=	3.93		
paper clips boxes		$	1 .87			
Index card packets		$	3 .93				
m.ananth@hotmail.ca