julio had 50 songs on his mp3 player. he and his friend carlos each added songs to their mp3 players....

arrwee

julio had 50 songs on his mp3 player. he and his friend carlos each added songs to their mp3 players. julio added 3 times as many songs as carlos did. if the final number of songs on julio's mp3 player was 128, how many songs did carlos add to his mp3 player?

 

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