Question 771577
x= 	Number	of $5 tickets						
y=	Number	of $6 tickets						
Total  sold	value							
5	x	+	6	y	=	1643	.............1	
condition
y=2x+16								
-2	x	+	1	y	=	16	.............2	
Eliminate	y							
multiply (1)by		-1						
Multiply (2) by		6						
-5	x		-6	y	=	-1643		
-12	x	+	6	y	=	96		
Add the two equations								
-17	x				=	-1547		
/	-17							
x	=	91						
plug value of			x	in (1)				
5	x	+	6	y	=	1643		
455		+	6	y	=	1643		
			6	y	=	1643		-455
			6	y	=	1188		
				y	=	198		
x=	91		Number	Of $5 tickets				
y=	198		Number	Of $6 tickets				
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