Pamela Gore lived 1/2 of her life in Oklahoma, 1/5 in Alaska, and 2/9 in Idaho. She then moved to Miami and died 7 years later. How long did Pamela live?
Let x represent the length of Pamela’s life.
x/2 + x/5 + 2x/9 + 7 = x
(45 + 18 + 20)x/90 + 7 = x
83x/90 + 7 = 90x/90
So 7 = 7x/90 and x = 90.