Let's simplify the equation step by step:
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Start with the original equation: \(-5a + 5a + 9 = 8\)
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Notice that \(-5a + 5a\) equals zero: \[ 0 + 9 = 8 \] Therefore, the equation simplifies to: \[ 9 = 8 \]
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The statement \(9 = 8\) is a contradiction; it is false.
Since the equation leads to a false statement, there are no solutions to the equation.
The answer is None.