Question 705593
canoe 	speed	=x	mph					
current     	speed	=y	mph					
against  	current     	2	hours					
with	current     	2	hours					
								
Distance against 		6	miles	distance with 		14	miles	
t=d/r	against	current     		-				
6	/	(	x	-	y	)=	2	
2	(	x	-	y	)	=	6	
2	x	-	2	y	=	6	....................1	
								
14	/	(	x	+	y	)=	2	
2	(	x	+	y	)	=	14	
2	x	+	2	y	=	14	...............2	
Multiply (1) by	1    							
Multiply (2) by	1							
we get				y				
2	x	+	-2	y	=	6		
2	x	+	2		=	14		
4	x	=	20					
/	4							
x	=	5	mph					
								
plug value of x in (1)				y				
2	x		-2	y	=	6		
10			-2	-10	=	6		
-2	y	=	6					
-2	y	=	-4	mph				
	y	=	2					
canoe 	speed	5	mph					
current     	speed	2	mph					
								
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