Giải hpt sau

giải hpt
$$\begin{gathered} a,\left\{\begin{array}{l}x\sqrt{2}-y\sqrt{3}=1\\ x+y\sqrt{3}=\sqrt{2}\end{array}\right. \\ b, \left\{\begin{array}{l}x-y=1 \\ \frac{x}{3}-\frac{y}{7}=383\end{array}\right. \end{gathered}$$