The second and third tank each have 20*2=<<20*2=40>>40 fish

So in total there are 20+40*2=<<20+40*2=100>>100 fish

# Answer

100
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
James has 3 fish tanks.  1 of the tanks has 20 fish in it and the other two have twice as many fish each as the first. How many total fish do they have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
100
James has 3 fish tanks.  1 of the tanks has 20 fish in it and the other two have twice as many fish each as the first. How many total fish do they have?
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