Question 454871
Walk speed	B	x	mph						
Riding speed	A	7	faster						
									
Walk speed 	20	miles						
ride		76	miles						
Walk speed	time	=	ride		time				
									
20 /x=76	/(x+7)
cross multiply									
20(x+7)=	76x	
20x+140=76x			
76x-20x	=140			
56x=140						
/56								
x=2  1/ 2 mph	Walk speed			
									
9.5mph	Riding speed