4x+3=8x﹣5．
解：移项得：﹣4x+8=0
合并同类项得：﹣4x=﹣8
系数化为1得：x=2．
-Whose book is this?
-It _________ be Li Ping's because there is his name on it.[ ]
A. must
B. may
C. can't
D. could
