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# If l1 is parallel to l2, what is x + 2y?

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Math Expert
Joined: 02 Sep 2009
Posts: 60501
If l1 is parallel to l2, what is x + 2y?  [#permalink]

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28 Oct 2014, 08:18
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Difficulty:

5% (low)

Question Stats:

89% (00:49) correct 11% (01:18) wrong based on 217 sessions

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Tough and Tricky questions: Coordinate Geometry.

Attachment:

2014-10-28_1914.png [ 18.23 KiB | Viewed 6523 times ]
If l1 is parallel to l2, what is x + 2y?

A. 90
B. 120
C. 180
D. 270
E. 360

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Joined: 16 Jul 2014
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GMAT Date: 01-23-2015
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Re: If l1 is parallel to l2, what is x + 2y?  [#permalink]

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28 Oct 2014, 08:48
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Interior angle of l1 and l2 is same and equal to 2x.

Also 2x+4y = 180 which implies x+2y =90.

Hope this is correct.. +1 Kudos if correct
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Re: If l1 is parallel to l2, what is x + 2y?  [#permalink]

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29 Oct 2014, 01:04
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Attachment:

2014-10-28_1914.png [ 18.56 KiB | Viewed 6417 times ]

Alternate angles are same; so 4y + 2x = 180

x + 2y = 90
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Re: If l1 is parallel to l2, what is x + 2y?  [#permalink]

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22 Nov 2019, 11:40
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Hello from the GMAT Club BumpBot!

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Re: If l1 is parallel to l2, what is x + 2y?  [#permalink]

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29 May 2016, 07:22
Bunuel wrote:

Tough and Tricky questions: Coordinate Geometry.

Attachment:
2014-10-28_1914.png
If l1 is parallel to l2, what is x + 2y?

A. 90
B. 120
C. 180
D. 270
E. 360

The shown angles are such that they are supplementary. (Vertically opposite angle of 2x will also have a value of 2x. That angle + 4y = 180). Or Corresponding angle of 4y will make a supplementary pair with 2x)

2x+4y = 180

x+2y =90

Re: If l1 is parallel to l2, what is x + 2y?   [#permalink] 29 May 2016, 07:22
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