To solve \( 3,891 - (-612) \), we can first simplify the expression:
Subtracting a negative number is the same as adding a positive number. Therefore, we can rewrite the expression as:
\[ 3,891 + 612 \]
Now, we perform the addition:
\[ 3,891 + 612 = 4,503 \]
Since \( 4,503 \) is a positive number, the result of \( 3,891 - (-612) \) is positive.