After 1 year, the father's age will be 4 times the age of his son. After 5 years, the father's age will be three times the age of his son. Find the age of the father and his son. Answer father 31 years old son 7 years old

Lời Giải

A f t er 1 ye a r, t h e f a t h e r^{'} s a g e w i ll b e 4 t im es t h e a g e o f hi s so n . A f t er 5 ye a rs, t h e f a t h e r^{'} s a g e w i ll b e t h ree t im es t h e a g e o f hi s so n . F in d t h e a g e o f t h e f a t h er an d hi s so n . A n s w er f a t h er 31 ye a rs o l d so n 7 ye a rs o l d

Father^{'} s age is : 31

Boy^{'} s age is : 7

Các bước giải pháp

Translate the problem into an equation:

x + 1 = 4 (y + 1), x + 5 = 3 (y + 5)

x + 1 = 4 (y + 1), x + 5 = 3 (y + 5) : x = 31, y = 7

Father^{'} s age is : 31

Boy^{'} s age is : 7