The difference between city hall and the post office is 6 1/2 miles ( six and one half)city hall is 1 1/3 (one and one fourth NOT eleven)miles closer to the library site than it is to the post office. Let d represent the distant from city hall to the library site write an expression for the distance from the library site to the post office
city hall to post office = 6 1/2 miles = represented by f city hall to library site = 1 1/4 miles = represented by d library site to post office = unknown. = represented by e
City hall to library site PLUS library site to post office IS EQUAL to city hall to post office
d + e = f
1 1/4 + e = 6 1/2
find e. e = 6 1/2 - 1 1/4 e = 13/2 - 5/4 e = (13*2)/(2*2) - 5/4 e= 26/4 - 5/4 e = (26-5)/4 e = 21/4 e = 5 1/4 distance from library site to post office.
