Question 516749
bigger number -----x
smaller nuber -----y

x-y =20..........1
5y=2x-4
5y-2x=-4.........2

solve for x & y

1	x		-1	y	=	20	.............1
-2	x	+	5	y	=	-4	.............2
Eliminate y							
multiply (1)by 		5					
Multiply (2) by		1					
5	x		-5	y	=	100	
-2	x		5	y	=	-4	
Add the two equations							
3	x				=	96	
/	3						
x	=	32      		
plug value of 			x	in (1)			
1	x	+	-1	y	=	20	
32		+	-1	y	=	20	
			-1	y	=	20	
			-1	y	=	-12	
				y	=	12