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upper level math high school math science social sciences literature and english foreign languages other
upper level math high school math science social sciences literature and english foreign languages other
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upper level math high school math science social sciences literature and english foreign languages other
upper level math high school math science social sciences literature and english foreign languages other

There are 40 cows and chickens in the farmyard. One quiet afternoon, Jack counted and found that there were 100 legs in all. How many cows and how many chickens are there?

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