ajutor e urgent,ex nr. 6!

Fie a, b, c cele 3 numere
a+b+c=1275
b=2a
b=c-510⇒c=b+510
Inlocuim in prima relatie:
a+2a+2a+510=1275
5a=1275-510
5a=765
a=153
b=2a⇒b=2*153⇒b=306
c=b+510⇒c=306+510⇒c=816