A boy purchased (bought) a party-length sandwich 55 in. long. He wants to cut it into three pieces so that the middle piece is 5 in. longer than the shortest piece and the shortest piece is 8 in. shorter than the longest piece. How long should the three pieces be?
Shortest piece has a length of _____ in.
Middle piece has a length of ___ in
Longest piece has a length of ____ in.