Răspuns:
a+12378=52503
a=52503-12378
a=40125
V:40125+12378=52503
b-23267=32726
b=23267+32726
b=55993
V:55993-23267=32726
353207+c=689304
c=689304-353207
c=336097
V:353207+336097=689304
893102-d=538429
d=893102-538429
d=354673
V:893102-354673=538429
Sper ca te-am ajutat!