You and your friend are having a race, but since you are faster than he is, you decide to give him a head start. He starts 10m in front of the starting line, while you start on the starting line. You run at 6 meters/second, while your friend runs at 5.5 meters/second. After how many seconds will you and your friend be same distance from the starting line? ( I need explanation in two step equation, if you can)