## SUBJECT I

Solve in $\mathbf{Z}$ the equation: $15 x y-35 x-6 y=3$.
## SUBJECT I

| $(5 x-2)(3 y-7)=17$ | $\mathbf{3 p}$ |
| :--- | :--- |
| Solving the cases | $\mathbf{3 p}$ |
| Finalizing $x=-3$ and $y=2$ as the unique solution | $\mathbf{1 p}$ |