cartera Posted December 7, 2008 Share Posted December 7, 2008 If x+y+z=0 and x+2y+3z=0 and y0, then what is x/y? a -1/2 b -1/3 c -1/6 d 1/3 e 1/2 OA A Quote Link to comment Share on other sites More sharing options...
vineejay Posted December 7, 2008 Share Posted December 7, 2008 x+y+z= 0 x+2y + 3z = 0 From both statements: y+2z=0 y= -2z substituting in statement 1: x-2z+z=0 -> x-z=0 -> x=z Therefore x/y= -(1/2) answer: A Quote Link to comment Share on other sites More sharing options...
smallbee Posted December 7, 2008 Share Posted December 7, 2008 A: x+y+z=0 hence 3x+3y+3z=0. B: x+2y+3z=0 Let A-B, we have 2x+y=0. Hence 2x=-y. So x/y=-1/2 Answer: A. Quote Link to comment Share on other sites More sharing options...
gmat_t1 Posted December 8, 2008 Share Posted December 8, 2008 (A) is the answer Quote Link to comment Share on other sites More sharing options...
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