To simplify the expression \([-29 - (-8)]\):
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First, simplify inside the brackets: \[ -29 - (-8) = -29 + 8 \]
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Now perform the addition: \[ -29 + 8 = -21 \]
Thus, we have: \[ [-29 - (-8)] = -21 \]
The original equation \([-29 - (-8) = [-21]\) is verified to be true, as both sides equal \(-21\). Therefore, the simplified result is: \[ -21 \]