If 17xy + 7 = 19xy, then 4xy = ?

2016

Answer: D. 14 — From 17xy + 7 = 19xy, subtract 17xy from both sides: 7 = 2xy. Therefore xy = 3.5 and 4xy = 14.

1. A.

   7

2. B.

   3.5

3. C.

   28

4. D.

   14

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