the total ages of two boys is now 17.what will it be in six years time?A:23 B:29 C:11 D:21最好说明细节
问题描述:
the total ages of two boys is now 17.what will it be in six years time?A:23 B:29 C:11 D:21
最好说明细节
答
B=17+6*2 六年过后嘛!