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During a certain week, a seal ate 50 percent of the first 80

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Joined: 15 Aug 2003
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During a certain week, a seal ate 50 percent of the first 80 [#permalink]

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13 Dec 2003, 05:56
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During a certain week, a seal ate 50 percent of the first 80 smelt it came across, and 30 percent of the remaining smelt it came across. If the seal ate 40 percent of the smelt it came across during the entire week, how many smelt did it eat?

32
40
55
64
80
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Joined: 12 Oct 2003
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Location: USA
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Kudos [?]: 6 [0], given: 0

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13 Dec 2003, 07:29
64

x --> total smelt
0.4(x) --> total smelt eaten

40 + 0.3(x-80) = 0.4(x)
16 = 0.1(x)
x = 160

0.4(x) = 64
13 Dec 2003, 07:29
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