To solve the equation \(\frac{x + 12}{1} = 9\), let’s break it down step by step:
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We start with the equation: \[ \frac{x + 12}{1} = 9 \]
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Since dividing by 1 doesn’t really change anything, we can just write: \[ x + 12 = 9 \]
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Now, we want to find out what \(x\) is. To do that, we need to get \(x\) all by itself. So, we can subtract 12 from both sides. It looks like this: \[ x + 12 - 12 = 9 - 12 \]
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This simplifies down to: \[ x = 9 - 12 \]
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Now we do the math on the right side: \[ 9 - 12 = -3 \]
So, the answer we find for \(x\) is: \[ x = -3 \]
That means the solution to our equation is: \[ \boxed{-3} \]