Jose is 489 feet from the Taco Truck. He starts walking along the boardwalk at a pace of 3 feet per second, walking slowly because he is looking at his phone.






Eventually, he looks up and sees the Taco Truck is about to close so he starts to run at a pace of 6 feet per second. The total time it took him to get to the Taco Truck is 90 seconds.






At what distance (`x`) from his starting position did he start running?