Question
Rael started with some marbles at the beginning of a game. At the end of the first round of the game, he lost 4 marbles to his friend Owen but won 8 marbles from his friend Japheth. At the end of the second round, he lost 4 marbles to Japheth but won 5 marbles from Owen. In the end, Rael had 23 marbles. How many marbles did Rael have at first before the start of the game?
4 m

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Rael started with some marbles at the beginning of a game. At the end of the first round of the game, he lost 4 marbles to his friend Owen but won 8 marbles from his friend Japheth. At the end of the second round, he lost 4 marbles to Japheth but won 5 marbles from Owen. In the end, Rael had 23 marbles. How many marbles did Rael have at first before the start of the game?