To solve the equation \( 173f - 1 = 1 \), we can follow these steps:
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Add 1 to both sides of the equation: \[ 173f - 1 + 1 = 1 + 1 \] \[ 173f = 2 \]
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Divide both sides by 173 to solve for \( f \): \[ f = \frac{2}{173} \]
Since none of the provided response options (3, 6, 5, 4) correspond to \( \frac{2}{173} \), there seems to be an error either in the original question or the response options. Please double-check the question and options provided or see if additional context is available.