Question 419037
boat speed	=	5	mph										
current speed 	=	x	mph										
													
Speed upstream=		5	-	x									
Speed downstream=		5	+	x									
													
Distance upstream=		1.5	miles										
Distance downstream=		3	miles										
													
t=d/r	time upstream = time downstream												
1.5	/	(	5	-	x	)=	3	/	(	5	+	x	)
1.5	(	5	+	x	)=	3	( 	5	-x	)			
7.5	+	1.5	x	=	15	-	3	x 					
3	x	-1.5	x	=	7.5								
1.5	x	=	7.5										
/	1.5												
x 	=	5	mph	boat speed