x+3=1.5*(x-9-3)

To solve the equation \( x + 3 = 1.5 \cdot (x - 9 - 3) \), let's simplify it step by step.

1. Start with the original equation:

   \[ x + 3 = 1.5 \cdot (x - 9 - 3) \]

2. Simplify the right side inside the parentheses:

   \[ x - 9 - 3 = x - 12 \]

   So the equation becomes:

   \[ x + 3 = 1.5 \cdot (x - 12) \]

3. Now distribute \(1.5\) on the right side:

   \[ x + 3 = 1.5x - 18 \]

4. Now, rearrange the equation to get all terms involving \(x\) on one side and constant terms on the other side. Let's subtract \(1.5x\) from both sides:

   \[ x - 1.5x + 3 = -18 \]

   This simplifies to:

   \[ -0.5x + 3 = -18 \]

5. Next, subtract \(3\) from both sides:

   \[ -0.5x = -18 - 3 \]

   This gives:

   \[ -0.5x = -21 \]

6. Now, divide both sides by \(-0.5\):

   \[ x = \frac{-21}{-0.5} = 21 \div 0.5 = 42 \]

The solution to the equation is:

\[ \boxed{42} \]