Together jillian and william has 900 eagle reward bucks after jillian used 2/7 of her eagle reward bucks and william used 180 of his they had the same amount of eagle rewards buck left together how many eagle reward bucks did they have left?

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