Question 766099
x= 	Number of	$10 notes							
y=	Number of	$5 notes							
 									
1	x	+	1	y	=	34	.............1		
Total value									
10	x	+	5	y	=	285	.............2		
Eliminate	y								
multiply (1)by		-5							
Multiply (2) by		1							
-5	x		-5	y	=	-170			
10	x	+	5	y	=	285			
Add the two equations									
5	x				=	115			
/	5								
x	=	23							
plug value of			x	in (1)					
1	x	+	1	y	=	34			
23		+		y	=	34			
				y	=	34-23	
				y	=	11			
				y	=	11			
x=	23		Number of	$10 notes					
y=	11		Number of	$5 notes					
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