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?
How many bitcoins did Jake have after the donation? ** He had 80-20=<<80-20=60>>60 after the donation
How many bitcoins did Jake give to his brother? ** He kept 60/2=<<60/2=30>>30 after giving half to his brother
How many coins does Jake have after tripling the number of bitcoins he has? ** So he has 30*3=<<30*3=90>>90 coins
How many coins does Jake have after the second donation? ** He then does 1 more donation and has 90-10=<<90-10=80>>80 coins left
#### 80