If 17xy + 7 = 19xy, then 4xy = ?
2016
If 17xy + 7 = 19xy, then 4xy = ?
- A.
7
- B.
3.5
- C.
28
- D.
14
Attempted by 27 students.
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Correct answer: D
From 17xy + 7 = 19xy, subtract 17xy from both sides: 7 = 2xy. Therefore xy = 3.5 and 4xy = 14.