Question 605056
x		Number of adult tickets						
y		Number of student tickets						
Total	attended							
2	x		-3	y	=	11	.............1	
								
4	x	+	1	y	=	15	.............2	
Eliminate	y							
multiply (1)by		1						
Multiply (2) by		3						
2	x		-3	y	=	11		
12	x	+	3	y	=	45		
Add the two equations								
14	x				=	56		
/	14							
x	=	4						
plug value of			x	in (1)				
2	x		-3	y	=	11		
8			-3	y	=	11		
			-3	y	=	11		-8
			-3	y	=	3		
				y	=	-1		
(4,-1) is the solution							
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