Solution: When the son reaches his father's present age, the father's age is the father's present age+the age difference between father and son, that is, twice the father's present age-the son's present age =56, while the father's present age+the son's age =40, so the father's present age is 96, that is, the father's present age is 32 and the son's age is 40-32=8.
Solution: When the son reaches his father's present age, the father's age is the father's present age+the age difference between father and son, that is, twice the father's present age-the son's present age =56, while the father's present age+the son's age =40, so the father's present age is 96, that is, the father's present age is 32, and the son's age is 40-32=8. The father's age is the father's present age+the age difference between father and son, that is, twice the father's present age-the son's present age =56, while the father's present age+the son's age =40, so the father's present age is 96, that is, the father's present age is 32, and the son's age is 40-32 =8. That is, the father's present age is twice that of the son, which is 56 years old, but now the father's age plus the son's age is 40 years old, so the father's present age is 96 years old, that is, the father's present age is 32 years old and the son's age is 40-32=8 years old. Now father's age+son's age =40 years old, father's age is 96 years old, that is, father's age is 32 years old and son's age is 40-32=8 years old. Solution: When the son reaches his father's age, the father's age is the father's age+the age difference between father and son, which is twice the father's age-the son's age is 56 and the father's age is now. The father's age is 96, that is, the father's age is 32 now, and the son's age is 40-32=8. Solution: When the son reaches his present age, the father's age is the father's present age+the age difference between father and son, that is, the father's present age-the son's present age =56 years old, and the father's present age+the son's age =40 years old. That is, the father's age is now 32, and the son's age is 40-32=8. Solution: When the son reaches his present age, the father's age is the father's present age+the age difference between father and son, which is twice the father's present age-the son's present age =56, and the father's present age+the son's age =40, so the father's present age is 96. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, his father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present father's age+his son's age =40, which adds up to three times his father's age, which is 32 years old. The age of the son is 40-32=8 years old. Solution: When the son reaches his father's present age, the father's age is his present age+the age difference between father and son, which is twice his present age-his present age =56, and his present age+his son's age =40. Adding the two together, the father is now 96 years old, that is, he is now 32 years old and his son is 96 years old.