Darcy = 2*Dexter = 2*8 = 16

Last year Darcy was 16 - 1 = <<16-1=15>>15

Dallas was 3 times Darcy last year = 3*15 = <<3*15=45>>45

Dallas is a year older now = 45 + 1 = <<45+1=46>>46

Dallas is 46 years old now.

# Answer

46
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Last year Dallas was 3 times the age of his sister Darcy. Darcy is twice as old as Dexter who is 8 right now. How old is Dallas now?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
46
Last year Dallas was 3 times the age of his sister Darcy. Darcy is twice as old as Dexter who is 8 right now. How old is Dallas now?
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