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A farmer has chickens and cows. You ask the farmer how many chickens he has, and how many cows he has. The farmer has 28 healthy animals, and they have total of 64 legs. How many of his animals are cows? Write an equation
set the number of chickens as x and number of cows as y so the farmer has total 28 animals so x+y=28 you know that since the animals are healthy chickens will have 2 legs and cows will have 4 legs the total number of legs are 64 so 2x+4y=64 since you want to find the number of cows so from the first equation x+y=28 we will get another equationx=28-y then plug into 2x+4y=64 2(28-y)+4y=64 56-2y+4y=64 56+2y=64 -56 -56 2y=8 y=4
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