Question 914852
x=	cost of	book						
y=	cost of	pen						
 								
2	x	+	3	y	=	55	.............1	
								
4	x	+	5	y	=	97	.............2	
Eliminate	y							
multiply (1)by		-5						
Multiply (2) by		3						
-10	x		-15	y	=	-275		
12	x	+	15	y	=	291		
Add the two equations								
2	x				=	16		
/	2							
x	=	8      						
plug value of			x	in (1)				
2	x	+	3	y	=	55		
16		+	3	y	=	55		
			3	y	=	55		-16
			3	y	=	39		
				y	=	13		1
x=	$8		cost of	book				
y=	$13		cost of	pen				
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