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October 25, 2014

October 25, 2014

Posted by **stef** on Sunday, July 29, 2012 at 7:03pm.

- math -
**drwls**, Sunday, July 29, 2012 at 7:24pmX new chickens

Y new cows.

X + Y = 30

2X + 4Y = 100

2X + 2Y = 60

2Y = 40

Y = 20

X = 30 - Y = 10

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