Question 587894
freight train		x				220	miles			
Passenger train		x+	16			300	miles			
										
t=d/r										
220/x=300/(x+16)
Cross multiply										
220(x+16)=300*x	
220	x	+	3520	=	300	x				
300	x		-220	x	=	3520				
80	x	=	3520							
/	80									
x	=	44	freight train	mph						
		60	Passenger train	mph