Ed is on a road trip. He has already traveled 206 miles and is driving at a rate of 67 miles per hour. Which equation could be used to find how many hours, x, Ed has left in his road trip if he is traveling 669 total miles? A. 206x + 67 = 669 B. 67x + 206 = 669 C. 206x + 669 = 67 D. 67x + 669 = 206