扫描二维码，直接登录
题库 / OG2017Q-PS-164
Becky rented a power tool from a rental shop. The rent for the tool was $12 for the first hour and $3 for each additional hour. If Becky paid a total of $27, excluding Sales tax, to rent the tool, for how many hours did she rent it?
5
6
9
10
12
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。