绿皮书的 243 38题
题干：S is the sum of three consecutive integers,the greatest of which is x.In terms of S,which of the following is the sum of three consecutive integers,the least of which is
A)S-6
B)S-3
C)S+3
D)S+6
E)2S
先透露下,正确答案是D,求大神解析下原因以及题干的大致翻译.有点看晕了