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 Post subject: x y DSPosted: Sat Sep 11, 2010 8:48 pm

Joined: Thu Jul 08, 2010 11:09 pm
Posts: 33
Are x and y both postive?

1) 2x-2y = 1

2) (x/y) > 1

Ans is C

i tried plugging in numbers for this but then gave up.
what is the quickest fastest way to solve this

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 Post subject: Re: x y DSPosted: Sun Sep 12, 2010 6:14 am

Joined: Thu Feb 12, 2009 6:32 pm
Posts: 497
The first statement tells us only that x is 1/2 bigger than y. However, it doesn't tell us anything about positive or negative.

The second statement tells us that EITHER both are positive or both are negative, but not which scenario.

If we combine the two, we still don't know positive or negative.

For example, our numbers could be -3 and -3.5 OR they could be 3 and 3.5 and both statements would still work.

Veritas Help

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