One seventh of 42 people ate pancakes, two thirds ate pancakes and eggs, the remaining ate eggs only. which fraction represent the number of people who ate eggs only

Can someone me and plz do the problem

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Ineed the question and choices are in the