Miles is a musician.  He owns three fewer trumpets than he has fingers, and two more guitars than he has hands.  He also owns two more trombones than he has heads, and one fewer French horn than he has guitars.  What is the total number of musical instruments that Miles owns?
How many trumpets does Miles have? ** Three fewer trumpets than Miles has fingers is 10-3=<<10-3=7>>7 trumpets.
How many guitars does Miles have? ** Two more guitars than he has hands is 2+2=<<2+2=4>>4 guitars.
How many trombones does Miles have? ** Two more trombones than he has heads is 2+1=<<2+1=3>>3 trombones.
How many French horns does Miles have? ** And one fewer French horn than he has guitars is 4-1=<<4-1=3>>3 French horns.
What is the total number of musical instruments that Miles owns? ** Altogether, Miles owns 7+4+3+3=<<7+4+3+3=17>>17 musical instruments.
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