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

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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, 08:17
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A
B
C
D
E

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  5% (low)

Question Stats:

89% (00:40) correct 11% (01:31) wrong based on 66 sessions

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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, 09:12
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4x + y = 8
−3x + y = 7
Adding both the equations --> x + 2y = 15

Answer: C
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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, 16:14
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, 17:20
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, 12:21
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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Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y? [#permalink]

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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, 05:59
Re: If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?   [#permalink] 23 May 2017, 05:59
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If 4x + y = 8 and y − 3x = 7, then what is the value of x + 2y?

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