Ed is on a road trip. He has already traveled 214 miles and is driving at a rate of 66 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 640 total miles? 214x + 66 = 640 214x + 640 = 66 66x + 214 = 640 66x + 640 = 214
