根据题意得：13×x-32=1，
去分母得：x-3=6，
解得：x=9．
故答案为：9
28. He raised a suggestion at the meeting, ____ well worth considering.
A．which I think is
B．which I think it is
C．I think is which
D．I think it is
中国移动开发者社区为AP提供哪几个渠道的客户服务？
