Asked by Sam

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



thx...
Answered by Steve
if there are c chickens, then there are 40-c cows. So, adding up the legs,

2c + 4(40-c) = 100
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