<PRE><B>Question 468699</B>
Javier	B	x	mph						
Maria	A	7	faster						
									
Javier		51	miles						
Maria		72	miles						
Javier	time	=	Maria		time				
									
51	/	x	=	72	/(	x	+	7	)
cross multiply									
51	(	x	+	7	)	=	72	x	
51	x	+	357	=	72	x			
72	x	-	51	x	=	357			
21	x	=	357						
/	21								
x	=	17      	mph			Javier			
									
24	mph	Maria	

Find the LCM of (4+3y), (16-9y^2), and (4-3y)

(4+3y), (4+3y)(4-3y), and (4-3y)	

LCM = (4+3y)(4-3y)					
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