He had 80-20=<<80-20=60>>60 after the donation

He kept 60/2=<<60/2=30>>30 after giving half to his brother

So he has 30*3=<<30*3=90>>90 coins

He then does 1 more donation and has 90-10=<<90-10=80>>80 coins left

# Answer

80
Question:
Jake amasses a fortune of 80 bitcoin.  He donates 20 bitcoins to charity.  He then gives half of all the bitcoins to his brother.  After that, he triples the number of bitcoins he has.  Then he donates another 10 coins.  How many coins does he have?
Answer:
Let's think step by step.

user
80
Jake amasses a fortune of 80 bitcoin.  He donates 20 bitcoins to charity.  He then gives half of all the bitcoins to his brother.  After that, he triples the number of bitcoins he has.  Then he donates another 10 coins.  How many coins does he have?
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