Find the smallest 4 digit number such that: - The number of tens plus the numbers of hundreds equals the number of thousand
AND
- The number of ones is half the number of tens and is one more than the number of hundreds.

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