Răspuns :
a+b+c= 8289
a+b=4001
b+c=5099
1. Cat e a?
8289-5099= 3190
2. Cat e c?
8289-4001=4288
3. Cat e b?
4001-3190=811
[tex]a+b+c=8289\\a+b=4001\\b+c=5099\\a+2b+c=9100\\a+b+c+b=9100\\8289+b=9100\\b=9100-8289=811\\a=4001-811=3190\\c=5099-811=4288\\Verificare:3190+811+4288=8289[/tex]