4816+a-2160=7291
4816+a=7291+2160
4816+a=9451
a=9451-4816
a=4635
proba: 4816+4635-2160=9451-2160=7291
6248-a+339=4017
6248-a=4017-339
6248-a=3678
a=6248-3678
a=2570
proba:6248-2570+339=3678+339=4017
8495-3815-a=2270
4680-a=2270
a=4680-2270
a=2410
proba: 8495-3815-2410=4680-2410=2270
Sper ca te-am ajutat!
