solve 3(x+3) = 18

To solve the equation \( 3(x + 3) = 18 \), follow these steps:

1. Start by dividing both sides by 3 to simplify:
\[
x + 3 = \frac{18}{3}
\]
\[
x + 3 = 6
\]

2. Next, subtract 3 from both sides to isolate \( x \):
\[
x = 6 - 3
\]
\[
x = 3
\]

So, the solution is \( x = 3 \).