To solve the equation \( 12 - \frac{x}{9} = 11 \), follow these steps:
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Subtract 12 from both sides of the equation:
\[ -\frac{x}{9} = 11 - 12 \]
\[ -\frac{x}{9} = -1 \]
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Multiply both sides by -1:
\[ \frac{x}{9} = 1 \]
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Multiply both sides by 9 to solve for \( x \):
\[ x = 9 \]
Thus, the solution is \( x = 9 \).