C162 The End of Lei Xiangren and Zhao Family

Lei Tia read: "There are a total of thirty chickens and ducks in the cage, each chicken costs four cents, and each duck costs two cents. Selling all the chickens and ducks would earn a total of eighty cents. How many chickens and ducks are there? "

Yuan Yuan counted with his fingers, but found that he couldn't get his fingers to move