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If 4x − 3y = 13 and 5x + 2y = −1, then x =

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Senior Manager
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If 4x − 3y = 13 and 5x + 2y = −1, then x = [#permalink] New post 20 Nov 2017, 11:13
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100% (00:49) correct 0% (00:00) wrong based on 1 sessions
If 4x − 3y = 13 and 5x + 2y = −1, then x =

A. −3
B. −1
C. 1
D. 3
E. 5

Kudos for correct solution.
[Reveal] Spoiler: OA
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Director
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Joined: 20 Apr 2016
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Re: If 4x − 3y = 13 and 5x + 2y = −1, then x = [#permalink] New post 01 Dec 2017, 21:57
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Bunuel wrote:
If 4x − 3y = 13 and 5x + 2y = −1, then x =

A. −3
B. −1
C. 1
D. 3
E. 5

Kudos for correct solution.


Here it can be written as

4x − 3y = 13 or 8x - 6y = 26 (multiplying by 2)

5x + 2y = −1 or 5x + 6 y = -3 (multiplying by 3)

Now adding the two equation we get

23x = 23

or x = 1
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Re: If 4x − 3y = 13 and 5x + 2y = −1, then x =   [#permalink] 01 Dec 2017, 21:57
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If 4x − 3y = 13 and 5x + 2y = −1, then x =

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