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# If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =A 5B

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Math Expert
Joined: 02 Sep 2009
Posts: 53066
If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =A 5B  [#permalink]

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22 Jan 2019, 00:58
00:00

Difficulty:

25% (medium)

Question Stats:

93% (01:33) correct 7% (01:54) wrong based on 19 sessions

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If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =

A 5
B 10
C 15
D 20
E 40

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Joined: 31 Oct 2013
Posts: 1162
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
Re: If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =A 5B  [#permalink]

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22 Jan 2019, 01:03
Bunuel wrote:
If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =

A 5
B 10
C 15
D 20
E 40

2a + 2b + 2b + 2c + 2a + 2c = 13 + 19 + 8

4a + 4b + 4c = 40

4( a + b + c) = 40

a + b + c = 10.

Re: If 2a + 2b = 13, 2b + 2c = 19, and 2a + 2c = 8, then a + b + c =A 5B   [#permalink] 22 Jan 2019, 01:03
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