Does anyone know what this means and how to do it

What is the value of x in the following equation. -x ^3/2 = -27

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

Find the ratios of the corresponding sides