Question 432985
x-y=9	.............1	
x+y=37	.............2	
Eliminate y								
x-y=9		
x+y=37		
Add the two equations								
2x=46		
/2							
x=23		
plug value of 			x	in (1)				
x-y=9		
23-y=	9		
-y=-14		
y=14