问题
单项选择题
There were 36,000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold, 9 times as many paperback copies as hardback copies were sold, if a total of 441, 000 copies of the novel were sold in all, how many paperback copies were sold ？（）
A．45,000
B．360,000
C．364,500
D．392,000
E．396,900
答案
参考答案：C
解析：
设简装本的销售量为x，则根据题意可列出如下方程：
[*]→x=364,500