To solve the equation \(-2y - 8 = 15\), follow these steps:
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Add 8 to both sides to isolate the term with \(y\):
\[ -2y - 8 + 8 = 15 + 8 \]
This simplifies to:
\[ -2y = 23 \]
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Divide both sides by -2 to solve for \(y\):
\[ y = \frac{23}{-2} \]
This simplifies to:
\[ y = -\frac{23}{2} \]
So the solution is:
\[ y = -\frac{23}{2} \]