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Sub 505 (Easy)|   Algebra|               
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fiendex
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Bunuel
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B - y could be 3 or -3 in statement 1
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B is correct. Here's why:

(1) y^2 = +/- 3

INSUFFICIENT - we need a single value for y in order to solve for a single value of x

(2) y = 3

=x+6+1 = 3-x
=x+7 = 3-x
=2x = -4 --> x = -2

SUFFICIENT
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Automated notice from GMAT Club BumpBot:

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