Question
At a farm, there were 511 as many chickens and cows. There were 42 more cows than chickens. The farmer sold away some cows. In the end, there were 59  as many chickens as cows. How many cows were sold away?
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At a farm, there were 511 as many chickens and cows. There were 42 more cows than chickens. The farmer sold away some cows. In the end, there were 59  as many chickens as cows. How many cows were sold away?