Question 522658
Adult	x	Tickets						
child	y	Tickets						
								
1	x	+	1	y	=	510	.............1	
3	x	+	1	y	=	930	.............2	
Eliminate y								
multiply (1)by 		-1						
Multiply (2) by		1						
-1	x		-1	y	=	-510		
3	x		1	y	=	930		
Add the two equations								
2	x				=	420		
/	2							
x	=	210						
plug value of 			x	in (1)				
1	x	+	1	y	=	510		
210		+	1	y	=	510		
			1	y	=	510		-210
			1	y	=	300		
				y	=	300		
Adult	210	Tickets						
child	300	Tickets						
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