Question 85
Solve the system
$$
\begin{cases}
\sqrt{x^2 + y^2 - 16(x + y) - 9y + 7} = y - 2 \\
x + 13\sqrt[4]{x - y} = y + 42
\end{cases}
$$
$$
\begin{cases}
\sqrt{x^2 + y^2 - 16(x + y) - 9y + 7} = y - 2 \\
x + 13\sqrt[4]{x - y} = y + 42
\end{cases}
$$