Blanche, Rose and Dorothy liked to collect sea glass when they went to the beach.  Blanche found 12 pieces of green and 3 pieces of red sea glass.  Rose found 9 pieces of red and 11 pieces of blue sea glass.  If Dorothy found twice as many pieces of red glass as Blanche and Rose and three times as much blue sea glass as Rose, how many pieces did Dorothy have?
Blanche found 3 pieces of red and Rose found 9 pieces of red for a total of 3+9 = <<3+9=12>>12 pieces of red
Dorothy found twice the amount of red as her friends so she has 2*12 = <<2*12=24>>24 pieces of red sea glass
Rose found 11 pieces of blue sea glass and Dorothy found 3 times that amount so she had 11*3 = <<11*3=33>>33 pieces of blue glass
Together, Dorothy found 24 red and 33 blue so she had 24+33 = <<24+33=57>>57 pieces of sea glass.
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