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Math Expert V
Joined: 02 Sep 2009
Posts: 55277
If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x +  [#permalink]

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Difficulty:   5% (low)

Question Stats: 98% (00:36) correct 2% (00:19) wrong based on 57 sessions

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If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x + 3, what is the value of x ?

A. 14
B. 15
C. 16
D. 17
E. 18

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CEO  P
Joined: 18 Aug 2017
Posts: 3539
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x +  [#permalink]

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If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x + 3, what is the value of x ?

A. 14
B. 15
C. 16
D. 17
E. 18

solve for LHS and RHS
40=10+2x
x=15
ans. C
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Manager  S
Joined: 24 Dec 2017
Posts: 192
Location: India
Concentration: Strategy, Real Estate
Schools: Johnson '21
Re: If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x +  [#permalink]

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1
5+8+12+15 = 40

40=3+4+x+x+3
40=10+2x
30=2x
30/2=x
15=x

Hence IMO B Re: If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x +   [#permalink] 16 Sep 2018, 23:38
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# If the sum of 5, 8, 12, and 15 is equal to the sum of 3, 4, x, and x +

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