Dan sold half of his comic books and then bought 7 more. he now is 13. which equation best represent the mount of comic books Dan started with

After the experience with great britain having a monarchy, the united states realized that everyone needed to have a voice in the government. the fact that americans had no voice was the main reason for the war. thus, they created a democracy, where the people voted for their representatives and the government ruled with the consent of the people.