A farmer raises chicken and cows. There are 31 animals in all. The farmer counts 96 legs total on these animals. How many of each type of animal does the farmer have?

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p.s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)