Question 539598
Let one number be x and other y

1    	x	+	1	y	=	19	.............1	
1	x		-1	y	=	55	.............2	
Eliminate 	y							
multiply (1)by 		1						
Multiply (2) by		1						
1	x		1	y	=	19		
1	x	+	-1	y	=	55		
Add the two equations								
2	x				=	74		
/	2							
x	=	37						
plug value of 			x	in (1)				
1    	x	+	1	y	=	19		
37		+	1	y	=	19		
			1	y	=	19		-37
			1	y	=	-18		
				y	=	-18		
	37&	-18						
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