Question 939767
x=	number of	adult tickets						
y=	number of	child tickets						
 								
1	x	+	1	y	=	170	.............1	
								
10	x	+	7	y	=	1475	.............2	
Eliminate	y							
multiply (1)by		-7						
Multiply (2) by		1						
-7	x		-7	y	=	-1190		
10	x	+	7	y	=	1475		
Add the two equations								
3	x				=	285		
/	3							
x	=	95						
plug value of			x	in (1)				
1	x	+	1	y	=	170		
95		+		y	=	170		
				y	=	170		-95
				y	=	75		
				y	=	75		1
x=	95		number of		adult tickets			
y=	75		number of		child tickets			
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