If xy+k=k

by **RUMNI** Wed Dec 24, 2008 9:47 am

If xy+k=k and x cannot equal 0, which of the following must be true?

(A) x>y

(B) x+y=0

(C) y=0

(D) |x-y|=0

(E) xy=1

by **Khalid** Wed Dec 24, 2008 4:35 pm

RUMNI Wrote:If xy+k=k and x cannot equal 0, which of the following must be true?

(A) x>y

(B) x+y=0

(C) y=0

(D) |x-y|=0

(E) xy=1

Is the answer C,

xy + k = k
xy = 0

But x cant equal 0, thus y = 0

by **rumni** Wed Dec 24, 2008 5:57 pm

Khalid...I think the answer is indeed C. This was an easy problem. Should have gotten it. Your explaination makes me see that.
Thanks.

by **RonPurewal** Sun Dec 28, 2008 9:11 am

Khalid Wrote:
Is the answer C,

xy + k = k
xy = 0

But x cant equal 0, thus y = 0

you got it.