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# If x = y and x + y = 10, then 2x + y =

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Math Expert
Joined: 02 Sep 2009
Posts: 54371
If x = y and x + y = 10, then 2x + y =  [#permalink]

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07 Apr 2019, 21:45
00:00

Difficulty:

25% (medium)

Question Stats:

100% (00:19) correct 0% (00:00) wrong based on 7 sessions

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If $$x = y$$ and $$x + y = 10$$, then $$2x + y =$$

(A) 3

(B) 15

(C) 18

(D) 24

(E) 30

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VP
Joined: 31 Oct 2013
Posts: 1322
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: If x = y and x + y = 10, then 2x + y =  [#permalink]

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07 Apr 2019, 21:48
Bunuel wrote:
If $$x = y$$ and $$x + y = 10$$, then $$2x + y =$$

(A) 3

(B) 15

(C) 18

(D) 24

(E) 30

Given,

x = y

x + y =10 = y + y =10 = 2y = 10 = y = 5.

x + y = 10

x + 5 = 10

x = 5.

2x + y = 2*5 + 5 = 15.

CEO
Joined: 18 Aug 2017
Posts: 3001
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: If x = y and x + y = 10, then 2x + y =  [#permalink]

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08 Apr 2019, 00:08
Bunuel wrote:
If $$x = y$$ and $$x + y = 10$$, then $$2x + y =$$

(A) 3

(B) 15

(C) 18

(D) 24

(E) 30

solve for
$$x = y$$ and $$x + y = 10$$
we get x=y=5
so 2x+y = 15
IMO B
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Re: If x = y and x + y = 10, then 2x + y =   [#permalink] 08 Apr 2019, 00:08
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