Răspuns :
E+V+D=217
E+V=158 ⇒ D=217-158=59 (cuburi gheata)
V+D=144 ⇒ E=217-144=73 (cuburi gheata)
V=217-59-73=85 (cuburi gheata)
E+V=158 ⇒ D=217-158=59 (cuburi gheata)
V+D=144 ⇒ E=217-144=73 (cuburi gheata)
V=217-59-73=85 (cuburi gheata)