Let the number be denoted as \( x \). According to the condition given:
\[ \frac{x + 6}{3} = 6 \]
To solve for \( x \), first multiply both sides of the equation by 3:
\[ x + 6 = 18 \]
Now, subtract 6 from both sides:
\[ x = 18 - 6 \]
\[ x = 12 \]
Since 12 is not in the options you provided, let's rewrite the equation to make sure:
Starting again, the original equation can be interpreted as:
\[ \frac{6 + x}{3} = 6 \]
This adjusts to:
\[ 6 + x = 18 \]
Solving gives \( x = 12 \).
Now, looking back at the options:
- \( 6 \)
- \( -\frac{2}{3} \)
- \( -6 \)
- \( 52 \)
None of the options match \( 12 \). Please clarify if the question is correctly stated or if there are other possible values for the given sum.