If Zack decided to give his three friends 20 marbles each, he gave them 3*20=<<3*20=60>>60 marbles.

If he kept five, Zack initially had 60+5=<<60+5=65>>65 marbles.

# Answer

65
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Zack's number of marbles can be divided equally among three people, leaving Zack with 5. If Zack decided to give his three friends 20 marbles each and kept five, how many marbles did he initially have?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
65
Zack's number of marbles can be divided equally among three people, leaving Zack with 5. If Zack decided to give his three friends 20 marbles each and kept five, how many marbles did he initially have?
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