Julia owns 3 * 20 = <<3*20=60>>60 bronze watches.

60+20 = <<60+20=80>>80 total silver and bronze watches

10% of all Julia's watches is 80 * 10/100 = <<80*10/100=8>>8 watches, and she decided to buy so many gold watches.

So in total Julia is in possession of 20 + 60 + 8 = <<20+60+8=88>>88 watches.

# Answer

88
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Julia collects old watches. She owns 20 silver watches, and three times as many bronze watches. She decided to buy gold watches to add to her collection, a number that represents 10% of all the watches she owns. How many watches does Julia own after this purchase?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
88
Julia collects old watches. She owns 20 silver watches, and three times as many bronze watches. She decided to buy gold watches to add to her collection, a number that represents 10% of all the watches she owns. How many watches does Julia own after this purchase?
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