Question 144771
J=5+x
E=9+x

(5+x)(9+x)=725
x^2+14x+45=725
x^2+14x-680=0
(-20 + x) (34 + x)=0
So x=20 or x=-34. x=-34 does not make sense so we exclude it from the answer set.

If x=20, J will be 25, E will be 29.

25*29=725

(The answer was after 20 years from the current time.)