Vertical angles are equal, so we can set up the equation as follows:
\[ \text{Angle A} = \text{Angle B} \]
Given that Angle A is 72 degrees and Angle B is \(3x + 6\), we have:
\[ 72 = 3x + 6 \]
Now, let's solve for \(x\):
- Subtract 6 from both sides:
\[ 72 - 6 = 3x \]
\[ 66 = 3x \]
- Divide both sides by 3:
\[ x = \frac{66}{3} = 22 \]
So, the value of \(x\) is \(22\).