Question 519525
$2 coins = x
$5 coins y

x/3=y+1
x=3(y+1)
x=3y+3

2x+5y=39

1	x		-3	y	=	3	.............1	
2	x	+	5	y	=	39	.............2	
Eliminate y								
multiply (1)by 		5						
Multiply (2) by		3						
5	x		-15	y	=	15		
6	x		15	y	=	117		
Add the two equations								
11	x				=	132		
/	11							
x	=	12.00			12      			
plug value of 			x	in (1)				
1	x	+	-3	y	=	3		
12		+	-3	y	=	3		
			-3	y	=	3		-12
			-3	y	=	-9		
				y	=	3.00		
$ 2 coins	12    	numbers						
$5 coins	3	numbers	

m.ananth@hotmail.ca