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题目内容 （请给出正确答案）
单选题
If x is an integer and y=7x+11, what is the greatest value of x for which Y is less than 50?
A

7

B

6

C

5

D

4

E

3

参考答案

参考解析
解析：
解答这道题的快速方法是把选项中的数值依次代入方程式，计算y的数值，直到满足条件y＜50为止，即可得出答案。
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