Question 9814
start with the -(-3) 
multiplying that you will get 3 for 2 negetive you get a positive.
(3)-7(6-3) subtract the 6 and the 3 
(3)-7(3)  now multiply the 7 and the 3
3-21  for I left the 3 in ( ) just to keep it out of the way.
-18 is your answer   and you are right