Ebook- answer to a question seems wrong

[SaraP735]

Hi,
This is regarding Ebook- Algebra- chapter6 problem set- question 5

It is a data sufficiency question and the Ebooks answer is E. However, I added both equations given in 1 and 2, and factored both sides which gives the simple X(1+Y)=4(1+Y) and therefore the terms in brackets cancel and it will give x=4. Is there anything wrong in this solution?

I am suspecting canceling the terms in bracket might not be allowed for some reason, which is why my answer is different from the book.

I appreciate if someone helps me.

Thanks.

[RonPurewal]

hi,
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