The perimeter of a college athletic field is 100 meters and the length is 12 m more than the width. find the length and width.

Length (L): w + 12

width (w): w

Perimeter (P) = 2L + 2w

               100 = 2(w + 12) + 2(w)

               100 = 2w + 24 + 2w

               100 = 4w + 24

                 76 = 4w

                  19 = w

Length (L): w + 12   = (19) + 12   = 31

width = 19 m, length = 31 m

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.