Question

Diferenta a 2 nr este 1858, daca le impartim obtinem catul 42 si restul 13 care sunt numerele

Answer 1

Fie a si b-cele doua numere.
a-b=1858
a:b=42 (rest 13)=>a=42b+13
42b+13-b=1858
41b=1858-13
41b=1845
   b=1845:41
   b=45=>a=42b+13=42*45+13=1890+13=1903

Answer 2

$a-b=1858 \\ a:b=42r13=\ \textgreater \ a=42b+13 \\ 42b+13-b=1858 \\ 41b=1858-13 \\ b=1845:41 \\ b=45 \\ a=42*45+13 \\ a=1903$