Question 425901
Number of floor tickets x
Number of balcony ticket  y


x+y=200	.............1	
15x+12y=2556	.............2	
								
multiply (1)by 	-12						
Multiply (2) by	1						
-12x-12y=-2400		
15x+12y=2556		
								
Add the two equations								
								
3x=156		
								
/3							
								
x=52 ===>	52.00	floor tickets		
								
plug value of x in (1)				
								
x+y=200		
52+y=200		
y=200-52
y=148 balcony tickets