From the condition, you havr these 2 equations J + S = 16, (1) ("Her age is twice the sum of her two children ages"; 16 =) J - S = 2 (2) ("Her son Jose is two years older than her daughter Sophia.") Add equations (1) and (2). You will get 2J = 16+2 = 18 ====> J = = 9. Answer. Jose is 9 years old. Sofia is 9-2 = 7 years old.