Question

Please show working out as well

Answer 1

Lets say David is x.

Now Stan is 4 years less than 2x. (2x-4)

John is x+3.

Therefore:

x+2x-4+x+3=35

4x=36

x=9

2x-4=2*9-4=18-4=14

x+3=9+3=12

David is 9, Stan is 14, John is 12.