Question 868374
Car B		x		mph	-	330	miles			
Car A		x+	14	mph	-	400	miles			
										
t=d/r										
330	/	x	=	400	/	(	x+		14	)
Cross multiply										
330	(	x		14	)	=	400	*	x	
330	x	+	4620	=	400	x				
400	x		-330	x	=	4620				
70	x	=	4620							
/	70									
x	=	66	Car B	mph						
		80	Car A	mph