2. 外语
  3. If the average(arithmetic mean)of two numbers is 16 and one of the numbers is x, what is the other number in terms of x?

If the average(arithmetic mean)of two numbers is 16 and one of the numbers is x, what is the other number in terms of x?

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问题 If the average(arithmetic mean)of two numbers is 16 and one of the numbers is x, what is the other number in terms of x?
选项 A、16-x
B、16-2x
C、16+x
D、32-x
E、32-2x
答案D
解析 The correct answer is D. If the average of two numbers, x and some other number we’ll call y, is 16, then= 16. Thus x+y=32 andy=32-x.
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