Henry is one third as old as Dave the difference of Their Age is 4 years, how old is Henry and Dave?
Let Dave's age =D
Henry's age =D/3
D - D/3 =4
2/3D = 4 multiply both sides by 3/2
D = 4 x 3/2
D=6 - Dave's age
6/3 = 2 - Henry's age.
