It seems like you are trying to solve an equation involving the variable \( x \) and potentially \( z \) as well, but the equation has not been clearly defined in your question.
If \( 9x - 29 = 88 \):
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Add 29 to both sides: \[ 9x - 29 + 29 = 88 + 29 \] \[ 9x = 117 \]
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Now, divide both sides by 9: \[ x = \frac{117}{9} = 13 \]
If you provide more context about \( z \) or other equations, I can help further. Please clarify the equations or expressions involving \( z \).