How do you set up and solve Zoron is ten years older than his sister in three years he will be twice as old as she will be then How old are they now?

Let's denote Zoron's current age as ( Z ) and his sister's age as ( S ). According to the problem, we have two equations: ( Z = S + 10 ) and ( Z + 3 = 2(S + 3) ). Substituting the first equation into the second gives ( (S + 10) + 3 = 2(S + 3) ). Solving this, we find ( S = 7 ) and ( Z = 17 ); thus, Zoron is currently 17 years old, and his sister is 7 years old.