Question

7. Determinați cifra a, dacă:
a) (12; 3a) = 1;
d) (7a;21) = 1;
b) (24; 5a) = 1;
e) (6a; 45) = 1;
c) (30; 2a)=1;
f) (80 ; 75)=1.​

Answer 1

Răspuns:

a)

(12;3a)=1

12:3a=1

a=1 =>>12:3

a=1 =>>4

12:(3x4)=1

12:12=1