Mathematics, 01.08.2019 09:00, tenoi14

William bought some tickets to see his favorite singer. he bought some adult tickets and some children tickets, for a total of 15 tickets. the adult's tickets cost $30 per ticket and the children's tickets cost $20 per ticket. if he spent $330 then how many adults and children's tickets did he buy? do it step by step

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William bought some tickets to see his favorite singer. he bought some adult tickets and some childr...