Question

果园里有苹果树、梨树、桃树共720棵,梨树棵数是桃树的2倍,苹果树的棵数是桃树的3倍。三种果树各有多少棵？

Answer 1

桃树=720÷(1+2+3)=120棵

梨树=120×2=240棵

苹果树=120×3=360棵

Answer 2

,桃树120颗，梨树240颗。苹果树360颗

Answer 3

设：梨树为x颗，苹果为y,桃树为z,据题意可知，x=2z,y=3z,因此，x+y+z=720,也就是2z+3z+z=720,z=120.ok