To solve the equation \(-16.8 = -0.1y - 1.8\), we can start by isolating the term that contains \(y\).
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Add 1.8 to both sides of the equation:
\[ -16.8 + 1.8 = -0.1y \]
\[ -15 = -0.1y \]
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Divide both sides by -0.1 to solve for \(y\):
\[ y = \frac{-15}{-0.1} \]
\[ y = 150 \]
So the solution to the equation is \(y = 150\).