# On a farm, the number of chickens was more than the number of ducks. After 20% of the chickens were sold, there were 800 less chickens than ducks on the farm. How many ducks were there on the farm? ___ducks

##### 1 Answer

Jul 7, 2018

#### Explanation:

so from (2)

multiply through by 5 to get whole numbers

substitute for c in (1).

but c must be a whole number so

in eqn (3) the term

so

Combining both of these conditions gives: