Question
Simon started with some balls at the beginning of a game. At the end of the first round of the game, he lost 5 balls to his friend Carl but won 9 balls from his friend Jack. At the end of the second round, he lost 7 balls to Jack but won 8 balls from Carl. In the end, Simon had 22 balls. How many balls did Simon have at first before the start of the game?
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Simon started with some balls at the beginning of a game. At the end of the first round of the game, he lost 5 balls to his friend Carl but won 9 balls from his friend Jack. At the end of the second round, he lost 7 balls to Jack but won 8 balls from Carl. In the end, Simon had 22 balls. How many balls did Simon have at first before the start of the game?