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Suppose there are x chickens and y cows

Then heads => x + y = 64

And Legs => 2x + 3y = 147

2*Heads: 2x +2y = 128

Subtract from Legs: 19 = y

Substitute in Heads: x = 45

Answer: 45 chickens.

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โˆ™ 2010-01-28 10:18:16
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Q: On a farm there are chickens and three-legged-cows. There are total of 64 heads and 147 legs. How many chickens are on the farm?
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