DS Problem: What is x?

[ArpitS975]

Question: What is x?

Statement 1: x=4y-4
Statement 2: xy = 8

Problem is from 5th Edition Algebra Manhattan GMAT, Page 71, Chapter 5.

The answer in the book is E.

I had originally come up with C as both statements together provide you with a quadratic equation which you can the solve for x.

Why is this? Just need some clarification.

Thanks!

[RonPurewal]

Please re-post this topic in the MGMAT non-CAT math folder. Thanks.