Question 432960
	Adult tickets number		x 	cost					
child tickets numbers	------------	y	cost					
x+y=370	.............1		
5x+3.5y	=1415	.............2		
Eliminate y									
multiply (1)by 		-3.5							
Multiply (2) by		1							
-3.5x-3.5y=-1295			
5x+3.5y=1415			
Add the two equations									
1.5x=120			
/1.5								
x=80 Adult tickets numbers