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# If 2x + 3y = 15 and y = 1, then 2x =

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Joined: 18 Apr 2015
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If 2x + 3y = 15 and y = 1, then 2x = [#permalink]  13 Aug 2019, 07:34
Expert's post
00:00

Question Stats:

92% (00:20) correct 7% (00:21) wrong based on 14 sessions
If 2x + 3y = 15 and y = 1, then 2x =

(A) 18

(B) 12

(C) 10

(D) 9

(E) 3
[Reveal] Spoiler: OA

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GRE Instructor
Joined: 10 Apr 2015
Posts: 3668
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Kudos [?]: 4222 [1] , given: 67

Re: If 2x + 3y = 15 and y = 1, then 2x = [#permalink]  13 Aug 2019, 07:42
1
KUDOS
Expert's post
Carcass wrote:
If 2x + 3y = 15 and y = 1, then 2x =

(A) 18

(B) 12

(C) 10

(D) 9

(E) 3

Plug y = 1 into the given equation to get: 2x + 3(1) = 15
Simplify: 2x + 3 = 15
Subtract 3 from both sides to get: 2x = 12

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com
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Re: If 2x + 3y = 15 and y = 1, then 2x =   [#permalink] 13 Aug 2019, 07:42
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