Manhattan GMAT Number Properties Question

Is the integer x odd? 1) 2(y+x) is an odd integer 2) 2y is an odd integer I don't agree with the book's answer. Here's my approach: 1) SUFF. Looking at statement 1, it is clear that y and/or x are fractions, and they add to a fraction with an odd number in the numerator (i.e. 1/2 + 2/2 = 3/2, multip...