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# If x + 3y = 5 and 3x + y = 7, then x + y =

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Math Expert
Joined: 02 Sep 2009
Posts: 61301
If x + 3y = 5 and 3x + y = 7, then x + y =  [#permalink]

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Updated on: 07 Jul 2019, 00:20
00:00

Difficulty:

5% (low)

Question Stats:

97% (00:40) correct 3% (00:48) wrong based on 29 sessions

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If x + 3y = 5 and 3x + y = 7, then x + y =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

Source: Nova GMAT
Difficulty Level: 500

_________________

Originally posted by Bunuel on 01 Jun 2017, 11:56.
Last edited by SajjadAhmad on 07 Jul 2019, 00:20, edited 1 time in total.
SVP
Joined: 26 Mar 2013
Posts: 2347
Concentration: Operations, Strategy
Schools: Erasmus '21 (M\$)
Re: If x + 3y = 5 and 3x + y = 7, then x + y =  [#permalink]

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01 Jun 2017, 11:58
Bunuel wrote:
If x + 3y = 5 and 3x + y = 7, then x + y =

(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

Summing up 2 equations as follows:

4x + 4y = 12

x + y = 3

Re: If x + 3y = 5 and 3x + y = 7, then x + y =   [#permalink] 01 Jun 2017, 11:58
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