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If Bill can buy 3 pairs of jeans and 2 shirts for $69

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Senior Manager
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Joined: 10 Apr 2012
Posts: 262
Location: United States
Concentration: Technology, Other
GPA: 2.44
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If Bill can buy 3 pairs of jeans and 2 shirts for $69  [#permalink]

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New post 27 Jun 2013, 19:41
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

87% (01:51) correct 13% (02:50) wrong based on 82 sessions

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If Bill can buy 3 pairs of jeans and 2 shirts for $69 or 2 pairs of jeans and 3 shirts for $66, how much does one shirt cost?

A. $10
B. $12
C. $13.20
D. $15
E. $16.80
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Posts: 59182
Re: If Bill can buy 3 pairs of jeans and 2 shirts for $69  [#permalink]

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New post 27 Jun 2013, 20:16
Manager
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Re: If Bill can buy 3 pairs of jeans and 2 shirts for $69  [#permalink]

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New post 30 Jun 2013, 05:54
3J + 2S = 69
2J + 3S = 66
----------------
5J + 5S = 135 ----(divide by 5)---> J + S = 27

3J + 2S = J + 2(J + S) = J + 54 = 69 ---> J = 15

3*15 + 2S = 69
45 + 2S = 69
2S = 24
S = 12

Answer: B
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Re: If Bill can buy 3 pairs of jeans and 2 shirts for $69  [#permalink]

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New post 16 Oct 2013, 00:12
3J + 2S = 69................ (1)
2J + 3S = 66.................(2)
----------------

(1) + (2) =

5J + 5S = 135,
J + S = 27 ................ (3)

(1) - (2) =

J - S = 3 .....................(4)

(4) - (3)

-2S = -24; S = 12
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Re: If Bill can buy 3 pairs of jeans and 2 shirts for $69   [#permalink] 16 Oct 2013, 00:12
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