Răspuns :
b-205=137
b=205+137=342
a+b=619
a+342=619
a=619-342=277
b-a=342-277=65
277+342=619(verificare)
b=205+137=342
a+b=619
a+342=619
a=619-342=277
b-a=342-277=65
277+342=619(verificare)