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题目内容双击单词支持查询和收藏哦～
Rachel, David, and Kristen decide to pool their money to buy a video game system. David contributes 4 dollars more than twice what Kristen does, and Kristen contributes 3 dollars less than Rachel does. If Rachel contributes r dollars, then, in terms of r, how much does David contribute?
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A.
-
B.
-
C.
- D.2r − 2
- E.2r + 7
D显示答案
以上解析由 考满分老师提供。
