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单选题
If b = 4 and c = 7, what is the value of 3b- 5c?
A

-27

B

-23

C

3

D

6

E

20

参考答案

参考解析
解析：
根据题干b=4，c=7，可知3b-5c= 3(4)-5(7) = 12-35 =-23
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