The equation you've provided is incomplete, as it has an equals sign but does not specify what it is equal to. If you want to simplify or solve for \( y \), please provide a complete equation.
For example, if you want to solve the equation: \[ -2y + 9 = 0 \]
You would isolate \( y \) like this:
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Subtract 9 from both sides: \[ -2y = -9 \]
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Divide by -2: \[ y = \frac{-9}{-2} = \frac{9}{2} \]
If you have a different equation in mind, please provide the full equation so I can help you accordingly!