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If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?

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Math Expert
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V
Joined: 02 Sep 2009
Posts: 50001
If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 11 Dec 2015, 09:17
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

85% (00:58) correct 15% (02:14) wrong based on 74 sessions

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D
Joined: 13 Apr 2015
Posts: 1693
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 11 Dec 2015, 10:12
2
4x + y = 8
−3x + y = 7
Adding both the equations --> x + 2y = 15

Answer: C
Senior Manager
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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 12 Dec 2015, 17:14
4x + y = 8
−3x + y = 7
x + 2y = 15

C. 15
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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 12 Dec 2015, 18:20
Adding both the equations, we get x + 2y = 15
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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 25 Apr 2016, 13:21
4x+y=8 ...equation 1
-3x+y=7 ...equation 2
adding both the equations
x+2y=15
correct answer option C
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sandeep : sharma
Concentration: International Business, Entrepreneurship
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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?  [#permalink]

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New post 23 May 2017, 06:59
GMAT Club Bot
Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y? &nbs [#permalink] 23 May 2017, 06:59
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If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?

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