Answer
$(-2,-9)$
Work Step by Step
We find the second pair of coordinates:
$ A(x_{1},y_{1})=\quad$...
$ B(x_{2},y_{2})=(3,-3)\quad$
$\left\{\begin{array}{l}
\Delta x=x_{2}-x_{1}=5\\
\Delta y=y_{2}-y_{1}=6
\end{array}\right.$
$\left\{\begin{array}{l}
x_{1}=x_{2}-\Delta x=3-5=-2\\
\\
y_{1}=y_{2}-\Delta y=-3-6=-9
\end{array}\right.$
$A(x_{1},y_{1})=(-2,-9)$
