What is this answer i dont know most of it

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

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.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction