Question 390899
Amy is 5 years younger than Josh.
a = j-5 
She is twice Sam's age.
a = 2s
:
we can write this as
2s = j-5
s = {{{(j-5)/2}}}

 Josh's age is less than 16. Sam is older than 4. How old is Sam?
The only integer solution would be: j=15, s=5
;
Sam is 5