Look once more at the following statement: Half of a certain number is equal to the sum of 3 times that number and 6.  In this statement, what is the mathematical equivalent for Òthe sum of 3 times that number and 6?Ó
 
(A) 3(x + 6) 
(B) 6(3x) 
(C) 6x(3 + x) 
(D) 3x + 6