Hi,

kelly is twice as old as Sue age .

(Note: Kelly's age represented by 2x)

Question states***four years from now, the sum of their ages will be 23.

***(2x+4) + (x+4) = 23

    3x = 15

     x = 5, Sue's age.  Kelly is 

CHECKING our answer***four years from now

 14 + 9 = 23

Wish You the Best in your Studies.

 

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