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18 May, 22:31

The equation 12x + 15y = 390 represents the total revenue during a one-day fundraiser. In the equation, x represents the number of youth T-shirts sold, and y represents the number of adult T-shirts sold. If there were 10 youth T-shirts sold, how many adult T-shirts were sold?

18 T-shirts

20 T-shirts

24 T-shirts

45 T-shirts

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Answers (1)
  1. 18 May, 22:53
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    12*10+15y=390

    120+15y=390

    15y=270

    y=18

    So 18 adult t-shirts were sold
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