Posted by **Alison** on Thursday, September 16, 2010 at 7:23pm.

How to solve: There are 40 chickens and cows in the farmyard. There are 100 legs in all. How many are cows and how many are chickens

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**rachel**, Thursday, September 16, 2010 at 7:24pm
chickens = 40/2

cows = 100/4

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**rachel**, Thursday, September 16, 2010 at 7:26pm
sorry!!!

cows=x

chickens=40-x

100=2(x)+4(40-x)

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**rachel**, Thursday, September 16, 2010 at 7:27pm
sorry again!

100=4(x)+2(40-x)

is the right one..

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**Anonymous**, Wednesday, December 23, 2015 at 4:37am
100=4(Ã—)+2(40-Ã—)

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