Question 782499
freight train		x	mph			330	miles			
Passenger train		(x+	14)mph			400	miles			
										
t=d/r				400						
330	/	x	=		/	(	x+		14	)
Cross multiply				14						
330	(	x		+14	)	=	400	*	x	
330	x	+	4620	=	400	x				
400	x		-330		=	4620				
70	x	=	4620							
/	70			mph						
x	=	66	freight train	mph						
		80	Passenger train	mph