To solve the equation \( 11 = -d + 15 \), we can follow these steps:
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Start with the original equation: \[ 11 = -d + 15 \]
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Subtract 15 from both sides to isolate the term with \( d \): \[ 11 - 15 = -d \] \[ -4 = -d \]
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Multiply both sides by -1 to solve for \( d \): \[ d = 4 \]
Thus, the solution is \( d = 4 \).