1. 25,5. 2.30,10. 3.35,15. 4. 50,30.
Let age of younger be x .then age of older be x+20. Now ,(x+20-5)=5(x-5) Or, x+15=5*x-25 Or, 4*x=40 Or x=10. So age of younger be 10 and older be 30.