Question 561044
first part	56	miles													
second part	9	miles													
															
speed in first part	x mph											
speed second part	x-5	mph											
Total rowing time3	hours												
Time first part	56/x									
Time second part  9/(x-5)											
Time first part + time second part =	5	hours								
56/x+9/(x-5)=5			
LCD =	x*(x-5)							
multiply the equation by the LCD															
we get															
56*(x-5)+9x=5(x(x-5))	
56x-280	+9x=5x^2+-25x
90x-280	=5x^2										
5X^2-90	x+280	=	0							
5	x^2+	-90	x+	280	=										
/	5														
x^2-18x+56	

x^2-14x-4x+56=0
x(x-14)-4(x-14)=0
(x-14)(x-4)=0

first part speed = 14 mph
second part 14-5 =9 mph

m.ananth@hotmail.ca