There are 3600 ducks in the farm, one third of which are chickens, and one fifth are geese. How many chickens and geese are there in the farm?

Professional teachers answer for you. (knowledge is power!)
If the chicken is x, the total number is 3x and the goose is 1 / 5 (x + 3600) = 1 / 5x + 1 / 5 * 3600
3X=3600+X+1/5*3600+1/5X
The solution is x = 2400
So there are 2400 chickens and 1 / 5x + 1 / 5 * 3600 = 480 + 720 = 1200 geese
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