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If Jake loses 8 pounds, he will weigh twice as much as his

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If Jake loses 8 pounds, he will weigh twice as much as his [#permalink] New post 07 Dec 2012, 04:08
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94% (02:28) correct 6% (02:17) wrong based on 185 sessions
If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake's present weight, in pounds?

(A) 131
(B) 135
(C) 139
(D) 147
(E) 188
[Reveal] Spoiler: OA
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Re: If Jake loses 8 pounds, he will weigh twice as much as his [#permalink] New post 07 Dec 2012, 04:12
Expert's post
Walkabout wrote:
If Jake loses 8 pounds, he will weigh twice as much as his sister. Together they now weigh 278 pounds. What is Jake's present weight, in pounds?

(A) 131
(B) 135
(C) 139
(D) 147
(E) 188


Let J be Jake's present weight and S be his sister's weight, then we can construct two linear equations:
J=2S+8;
J+S=278.

Subtract one from another: S=278-2S-8 --> S=90 --> J=188.

Answer: E.
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Re: If Jake loses 8 pounds, he will weigh twice as much as his [#permalink] New post 26 Apr 2014, 15:53
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Re: If Jake loses 8 pounds, he will weigh twice as much as his   [#permalink] 26 Apr 2014, 15:53
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