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What is the value of x? (1) x + y = 7 (2) x - y = 3 - y

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GMATBusters
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What is the value of x? (1) x + y = 7 (2) x - y = 3 - y [#permalink] New post  Updated on: 01 Oct 2022, 04:14
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What is the value of x?

(1) x + y = 7
(2) x - y = 3 - y
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Originally posted by GMATBusters on 17 Nov 2018, 09:26.
Last edited by Bunuel on 01 Oct 2022, 04:14, edited 2 times in total.
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Re: What is the value of x? (1) x + y = 7 (2) x - y = 3 - y [#permalink] New post  17 Nov 2018, 09:36
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1. 1 equation, 2 variables, cant solve for x, hence insufficient.

2. x - y = 3 - y which gives x = 3
Hence sufficient.

Option B

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Re: What is the value of x? (1) x + y = 7 (2) x - y = 3 - y [#permalink] New post  24 Feb 2022, 10:49
GMATBusters wrote:

Project DS Butler: Day 12: Data Sufficiency (DS23)


For DS butler Questions Click Here



What is the value of x?

(1) x + y = 7
(2) x - y = 3 - y


(A) \(x+y=7\) is the equation of a line and there are infinitely many points on this line. Hence, we cannot determine a unique value of x. Insufficient.

(B) \(x-y=3-y\) cancelling \(y\) from both sides we get \(x=3\). Sufficient.

Hence, B.
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Re: What is the value of x? (1) x + y = 7 (2) x - y = 3 - y [#permalink]
24 Feb 2022, 10:49
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