Question 453011
Freight train		x	----	209	miles			
Passanger Train		x+18------	308	miles			
										
t=d/r						
209/x=308/(x+18)
Cross multiply										
209(x+18)=308*x
209x+3762=308x				
308x-209x=3762				
99x=3762							
/99									
x=38	Freight train	mph						
38+18===>56	Passanger Train	mph