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Out of a list of mailing addresses, company A has x addresses, company

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Out of a list of mailing addresses, company A has x addresses, company  [#permalink]

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New post 17 Dec 2019, 00:24
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Out of a list of mailing addresses, company A has x addresses, company B has y addresses, and companies A and B combined have a total number of addresses equal to 3 times as many as company A has. How many mailing addresses belong to both companies?

A. x
B. y
C. x + y
D. y - 2x
E. x - 2y


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Re: Out of a list of mailing addresses, company A has x addresses, company  [#permalink]

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New post 17 Dec 2019, 02:08
Assume number of mailing addresses belong to both companies= k

x+y-k= 3x
k= y-2x

Bunuel wrote:
Out of a list of mailing addresses, company A has x addresses, company B has y addresses, and companies A and B combined have a total number of addresses equal to 3 times as many as company A has. How many mailing addresses belong to both companies?

A. x
B. y
C. x + y
D. y - 2x
E. x - 2y


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Re: Out of a list of mailing addresses, company A has x addresses, company   [#permalink] 17 Dec 2019, 02:08
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Out of a list of mailing addresses, company A has x addresses, company

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