Question 684844
x= 	number of adult tickets							
y=	number of senior citizen  tickets							
Total tickets sold								
1	x	+	1	y	=	515	.............1	
								
20	x	+	13	y	=	7822	.............2	
Eliminate	y							
multiply (1)by		-13						
Multiply (2) by		1						
-13	x		-13	y	=	-6695		
20	x	+	13	y	=	7822		
Add the two equations								
7	x				=	1127		
/	7							
x	=	161						
plug value of			x	in (1)				
1	x	+	1	y	=	515		
161		+		y	=	515		
				y	=	515		-161
				y	=	354		
				y	=	354		
x=	161		number of adult tickets					
y=	354		number of senior citizen  tickets					
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