Question 817649
x= 	number of	adults						
y=	number of	children						
 								
1.00	x	+	1.00	y	=	70.00	.............1	
Total value								
3.00	x	+	2.00	y	=	190.00	.............2	
Eliminate	y							
multiply (1)by		-2.00						
Multiply (2) by		1.00						
-2.00	x		-2.00	y	=	-140.00		
3.00	x	+	2.00	y	=	190.00		
Add the two equations								
1.00	x				=	50.00		
/	1.00							
x	=	50.00						
plug value of			x	in (1)				
1.00	x	+	1.00	y	=	70.00		
50.00		+		y	=	70.00		
				y	=	70.00		-50.00
				y	=	20.00		
				y	=	20.00		
x=	50.00		number of	adults				
y=	20.00		number of	children				
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