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Let x, y, and z be non-zero numbers such that the average (arithmetic mean) of x...
Question 7
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Let x, y, and z be non-zero numbers such that the average (arithmetic mean) of x and twice y is equal to the average (arithmetic mean) of y and twice z. What is the average (arithmetic mean) of x and y?
A.
fff\(\frac{z}{2}\)/fff
B.z
C.2z
D.z − x
E.z − y
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