a+b+c=4584
a+b=2785
c=b+689



Răspuns :

2785+b+689=4584
3474+b=4584
b=4584-3474
b=1110
a+1110=2785
a=2785-1110
a=1675
1675+1110+c=4584
2785+c=4584
c=4584-2785
c=1799
datele le stii
c+2785=4584
c=4584-2785
c=1799
b=1799-689
b=1110
a=2785-1110
a=1675