To solve the equation \( 3(x + 3) = 18 \), follow these steps:
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Start by dividing both sides by 3 to simplify: \[ x + 3 = \frac{18}{3} \] \[ x + 3 = 6 \]
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Next, subtract 3 from both sides to isolate \( x \): \[ x = 6 - 3 \] \[ x = 3 \]
So, the solution is \( x = 3 \).