A.) 15

B.) 18

C.) 20

D.) 23

E.) 30

**x = Inga's age**

**2x = Sergio's age**{Sergio is twice as old as Inga}

**x + 3 = Nage's age**{Inga is 3 years younger than Nage}

x + 2x + x + 3 = 63 {the sum of their ages is 63}

4x + 3 = 63 {combined like terms}

4x = 60 {subtracted 3 from each side}

x = 15 {divided each side by 3}

x + 3 = 18 {Nage's age is x + 3}

**B.) 18**

*- Algebra House*