\[BA = 7\ дм,\ \ CK = 9\ дм,\]
\[\ \ AK = 22\ дм.\]
\[AC = AK - CK = 22 - 9 =\]
\[= 13\ дм.\]
\[BC = BA + AC = 7 + 13 =\]
\[= 20\ дм.\]
\[Ответ:13\ дм\ и\ 20\ дм.\]