630 - ( 48+ 57 + 63 ) = 630 - 168= 462 ====p.e
462 : 3 = 154 ==== o p.e
a = 154 + 48
a = 202
b = 154 + 57
b = 211
c = 154 + 63
c = 217
Verificare: a + b + c ="630
202 + 211 + 217 =
413 + 217 = 630=====ADEVARAT
202 - 48 = 154======
211 - 57 = 154======= ADEVARAT
217 - 63 = 154=======