To solve the equation, we'll start by isolating x.
First, we'll undo the multiplication by 2 by dividing both sides by 2: \(2(x+3) = 12\)
\(x+3 = 6\)
Now we'll subtract 3 from both sides to isolate x: \(x+3-3 = 6-3\)
\(x = 3\)
So the solution to the equation is \(x = 3\)