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Is x=0? 1. xy=x 2. x+y=y

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CEO
Joined: 21 Jan 2007
Posts: 2764
Location: New York City
Followers: 9

Kudos [?]: 349 [0], given: 4

Is x=0? 1. xy=x 2. x+y=y [#permalink]  13 Nov 2007, 13:36
Is x=0?

1. xy=x
2. x+y=y
SVP
Joined: 05 Jul 2006
Posts: 1519
Followers: 5

Kudos [?]: 115 [0], given: 39

Is x=0?

1. xy=x
2. x+y=y

from one

y = 1, or x = 0

from 2

x = 0

Director
Joined: 26 Feb 2006
Posts: 905
Followers: 4

Kudos [?]: 52 [0], given: 0

Re: Easy Number Prop x = 0? [#permalink]  17 Nov 2007, 21:24
bmwhype2 wrote:
Is x=0?

1. xy=x
2. x+y=y

1, x and y could be 1.

2, x + y = y
x = y - y
x = 0

B.
Re: Easy Number Prop x = 0?   [#permalink] 17 Nov 2007, 21:24
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