To solve for \( z \) in the equation \( (10 + z) - 4 = 18 \), we can follow these steps:
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Simplify the equation: \[ 10 + z - 4 = 18 \] This simplifies to: \[ 6 + z = 18 \]
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Next, isolate \( z \) by subtracting 6 from both sides: \[ z = 18 - 6 \] This gives: \[ z = 12 \]
Therefore, the value of \( z \) is 12.