Question 604125
x		Number of adult tickets						
y		Number of student tickets						
Total	attended							
7	x	+	10	y	=	10	.............1	
								
15	x	+	8	y	=	94	.............2	
Eliminate	y							
multiply (1)by		-4						
Multiply (2) by		5						
-26	x		-40	y	=	-40		
75	x	+	40	y	=	470		
Add the two equations								
49	x				=	430		
/	49							
x	=	9						
plug value of			x	in (1)				
7	x	+	10	y	=	10		
57		+	10	y	=	10		
			10	y	=	10		-57
			10	y	=	-47		
				y	=	-5		
$	9		Number of adult tickets					
$	-5		Number of student tickets					
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