Answer :

Let's assume Thor's age is x years. According to the given information, Elsa is 7 years younger than Thor, so Elsa's age would be x - 7 years.

The sum of their ages is 35, so we can set up the equation:

x + (x - 7) = 35

Simplifying the equation:

2x - 7 = 35

Adding 7 to both sides:

2x = 42

Dividing both sides by 2:

x = 21

So Thor is 21 years old.

Substituting this value back into the equation for Elsa's age:

Elsa's age = 21 - 7 = 14

Therefore, Thor is 21 years old and Elsa is 14 years old.