Question 435560
$10 tickets x
$15 tickets y

1 x + 1 y = 2200 .............1
10 0 + 15 y = 26600 .............2

1	x	+	1	y	=	2200	.............1	
10	x	+	15	y	=	26600	.............2	
Eliminate y								
multiply (1)by 		-15						
Multiply (2) by		1						
-15x-15y=-33000		
10x+15y=26600		
Add the two equations								
-5x=-6400		
/-5							
x=1280 	tickets	
plug value of 			x	in (1)				
x+y=2200		
1280+y=2200		
y	=	2200		-1280
y	=	920		
y	=	920 tickets