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Re: Inequality from GMATPrep [#permalink]
14 Jul 2010, 23:49

Seems, i got problem with it. (1) x=8, y=5, then 8-5>8+5 wrong x=8, y=-5, then 8--5>8-5 right so A looks unsuff (2)y=-20 from x-y>x+y we have y<0 suff Looks like (B)

Re: Inequality from GMATPrep [#permalink]
15 Jul 2010, 03:59

ulm wrote:

Seems, i got problem with it. (1) x=8, y=5, then 8-5>8+5 wrong x=8, y=-5, then 8--5>8-5 right so A looks unsuff (2)y=-20 from x-y>x+y we have y<0 suff Looks like (B)

If you know that x=8, you know that y has to be negative!! --> Because: x-y>10

If x is 8 and some number is subtracted and you get a number >10, the subtracted number has to be <-2

Re: Inequality from GMATPrep [#permalink]
15 Jul 2010, 06:11

ulm wrote:

Seems, i got problem with it. (1) x=8, y=5, then 8-5>8+5 wrong x=8, y=-5, then 8--5>8-5 right so A looks unsuff (2)y=-20 from x-y>x+y we have y<0 suff Looks like (B)

if x = 8 and y = 5, then x-y>10 (WHICH IS A GIVEN !!!) is not fulfilled.........

gmatclubot

Re: Inequality from GMATPrep
[#permalink]
15 Jul 2010, 06:11

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