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# IS absolute value of x=y-z?

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Manager
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IS absolute value of x=y-z? [#permalink]

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05 Dec 2005, 19:20
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IS absolute value of x=y-z?

1) x+y=z

2) x<0

plz explain

thankssss
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VP
Joined: 06 Jun 2004
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05 Dec 2005, 19:27
mand-y wrote:
IS absolute value of x=y-z?

1Â° x+y=z

2Â° x<0

plz explain

thankssss

Is |x| = y-z? or x = y-z when x > 0, or x = -y + z when x < 0

(1) x+y = z ==> x = -y + z ==> No info about x. Insufficient
(2) x < 0 ==> No info about y - z. Insufficient

(1) + (2) Sufficient.
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06 Dec 2005, 19:19
mand-y wrote:
IS absolute value of x=y-z?

C

1Â° x+y=z

2Â° x<0

plz explain

thankssss

1) 2+4=6 or -2+8=6 so Insuff

2) x<0 Insuff
taking together

x< 0 and x=z-y |x|=z-y Suff
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08 Dec 2005, 13:02
1. x=z-y /x/=z-y if x>0 or /x/=y-z if x<0

combining (1) and (2), x<0 /x/=y-z. Sufficient.

C stands
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08 Dec 2005, 13:02
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