Help with word problem

[Guest]

I need help to solve this problem.
Smith bicycled 45 miles going east from Durango, and Jones bicycled 70 miles. Jones averaged 5 miles per hour more than Smith, and his trip took one-half hour longer than Smith's. How fast was each one traveling?

Here is what I have.

70x-45x+225+30x^2+150

 

[Gene]

You have to have an = to solve anything.
You may have heard a rumor that distance = speed times time.
S is average speed of Smith
J is average speed of Jones
T is Smiths time in hours.

45=S*T
70=J*(T+.5)=(S+5)(T+.5)