Question 1002528
x= 	commercials of 30 sec							
y=	commercials of 60 sec 	kid ticket						
Total comercials								
1	x	+	1	y	=	24	.............1	
Total value								
30	x	+	60	y	=	960	.............2	
Eliminate	y							
multiply (1)by		-60						
Multiply (2) by		1						
-60	x		-60	y	=	-1440		
30	x	+	60	y	=	960	( 16 mins = 960 sec)	
Add the two equations								
-30	x				=	-480		
/	-30							
x	=	16						
plug value of			x	in (1)				
1	x	+	1	y	=	24		
16		+		y	=	24		
				y	=	24		-16
				y	=	8		
				y	=	8		
x=	16		commercials of 30 sec					
y=	8		commercials of 60 sec 					
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