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If the perimeter of the rectangle above is 80, what is the value of x?

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If the perimeter of the rectangle above is 80, what is the value of x? [#permalink]

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If the perimeter of the rectangle above is 80, what is the value of x?

(A) 4
(B) 8
(C) 10
(D) 12
(E) 16

[Reveal] Spoiler:
Attachment:
2017-09-20_1020_003.png
2017-09-20_1020_003.png [ 2.03 KiB | Viewed 450 times ]
[Reveal] Spoiler: OA

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Re: If the perimeter of the rectangle above is 80, what is the value of x? [#permalink]

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New post 20 Sep 2017, 05:00
Bunuel wrote:
Image
If the perimeter of the rectangle above is 80, what is the value of x?

(A) 4
(B) 8
(C) 10
(D) 12
(E) 16

[Reveal] Spoiler:
Attachment:
2017-09-20_1020_003.png


Perimeter = 2 (2x+3x) = 2 X 5x =10x =80
x=8
Answer B

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Re: If the perimeter of the rectangle above is 80, what is the value of x? [#permalink]

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New post 25 Sep 2017, 18:07
Bunuel wrote:
Image
If the perimeter of the rectangle above is 80, what is the value of x?

(A) 4
(B) 8
(C) 10
(D) 12
(E) 16

[Reveal] Spoiler:
Attachment:
2017-09-20_1020_003.png


Using the formula for the perimeter of a rectangle, which is p = 2(length) + 2(height), we can create the following equation:

2(2x) + 2(3x) = 80

2x + 3x = 40

5x = 40

x = 8

Answer: B
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Re: If the perimeter of the rectangle above is 80, what is the value of x?   [#permalink] 25 Sep 2017, 18:07
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If the perimeter of the rectangle above is 80, what is the value of x?

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