[tex]398-22\cdot a=\overline{bbb}\\
22a=398-\overline{bbb}\\
Deoarece\ 398-\overline{bbb}\ \textgreater \ 0\Rightarrow b\in \{1,2,3\}\\
Dac\breve{a}\ b=1\Rightarrow 22a=287\Rightarrow a=\dfrac{287}{22}\notin \mathbb{N}\\
Dac\breve{a}\ b=2\Rightarrow 22a=176\Rightarrow a=8\\
Dac\breve{a}\ b=3\Rightarrow 22a=65(nu\ convine)\\
S:(a,b)=(8;2)[/tex]