There are 450 chickens and ducks in the farm. After half of the chickens sold and 30 ducks bought, the chickens are twice as many as the ducks. How many chickens and ducks are there?

There are 450 chickens and ducks in the farm. After half of the chickens sold and 30 ducks bought, the chickens are twice as many as the ducks. How many chickens and ducks are there?

If there were x ducks, there would be (450-x) chickens
(450-X)÷2= (X+30)×2
225-2/1X=2X+60
2.5X=165
X=66
450-66 = 384 A: there were 384 chickens and 66 ducks