Răspuns:
a ÷ 7 = C1 rest 5
a = 7 × C1 + 5
a ÷ 11 = C2 rest 9
a = 11 × C2 + 9
a - 5 = 7 × C1
a - 9 = 11 × C2
C.m.m.m.c. = ( 7 , 11 ) = 7 × 11 = 77
a - 5 = 77
a = 77 + 5
a = 82
a - 9 = 77
a = 9+ 77
a = 86
Verificare :
82 : 7 = 11 rest 5
86 : 11 = 7 rest 9
