作者PINKENVI (是一条不归路)
看板GMAT
标题[计量] pp2-137
时间Tue Aug 12 17:36:06 2008
137.
Connie paid a sales tax of 8 percent on her purchase. If the sales tax had
been only 5 percent, she would have paid $12 less in sales tax on her purchase.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
What was the total amount that Connie paid for her purchase including sales tax
?
(A) $368
(B) $380
(C) $400
(D) $420
(E) $432
ansE
设x为原价。
1.08x = 1.05x+12
^^^^^^^^
我不懂为啥要加12?就题目来看，不是少12吗?
有人可以帮解答吗?
谢谢!!!
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1F：推 mauricew:如果税是5%,他此次购买金额(只目前8%税)会减少12美元 08/12 17:39
2F：→ PINKENVI:谢谢耶! ^_^ 08/12 17:47