Consider two sets
\[\begin{align}
A &= \left \{ (x, y)\mid -2x-y=2 \right \}, \\
B &= \left \{ (x, y)\mid (c+5)x+3y=10 \right \}.
\end{align}\]
If \(A \cap B=\emptyset\), what is the value of the constant \(c?\)

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