Question 265176
Let the age of Sue = x
Then the age of Jen = x+4
Given,in 4 years, Jen will be twice as old as sue was 5 years ago. 
     x+4+4 = 2(x-5)
     x+8 = 2x-10
     8+10 = 2x-x
     18 = x
     x = 18
So, the age of Sue = 18
and the age of Jen = x+4 = 18+4 = 22