Question 774259
x= 	cost of	senior citizens tickets						
y=	cost of	children tickets						
First day								
4	x	+	2	y	=	80	.............1	
day II								
5	x	+	7	y	=	145	.............2	
Eliminate	y							
multiply (1)by		-7						
Multiply (2) by		2						
-28	x		-14	y	=	-560		
10	x	+	14	y	=	290		
Add the two equations								
-18	x				=	-270		
/	-18							
x	=	15						
plug value of			x	in (1)				
4	x	+	2	y	=	80		
60		+	2	y	=	80		
			2	y	=	80		-60
			2	y	=	20		
				y	=	10		
x=	15		cost of	senior citizens tickets				
y=	10		cost of	children tickets				
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